PACK INITIALIZATION (DPREP)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP94T00858R000601170001-4
• Release Decision: RIPPUB
• Original Classification: U
• Document Page Count: 28
• Document Creation Date: December 28, 2016
• Document Release Date: September 15, 2008
• Sequence Number: 1
• Publication Date: November 5, 1985
• Content Type: REPORT

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NDS OPERATIONS PROCEDURE MANUAL SYSTEMS SOFTWARE & HARDWARE
NO. P-DO06 5 November 1985
PACK INITIALIZATION (DPREP)
SYMBOLIC TITLE: DPREP
PROGRAMMER: 25X1
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DMINISTRATIVE-INTERNAL USE!Y
CLASSIFICATION
DCR NO:
DOCUMENT CHANGE REQUEST (DCR)
DATE LOGGED:
DATE CLOSED: p/ e
ITLE Pack Initialization (DPREP) NO.
P-DO06
(IF NEW, ASSIGNED BY CIB DOC
INITIATOR SECTION SPB DATE 9/2 0 85 PHONE 25
TECHNICAL MONITOR SECTION SPB DATE 9/30/8E, PHO 25
SYSTEM AFFECTED: 1100/OPS x 1100/M&A COINS
RTMS OTHER
BRANCH CHIEF SIGNATURE
DATE o s- 25
INITIATING DOCUMENT NO.: DR # RFC #
OTHER
NEED FOR CHANGE:
Exisiting procedures were incomplete and out of date.
DCOB INTERIM APPROVAL:
25
DATE
C/DCOB: /or z ws-
CONCUR NON-CONCUR
INAL APPROVAL:
DA 7E
CONCUR NON-CONCUR
/ED:
C/OD:
ADM N1ST~anTt~,r_ nr ~-G?;.,u~L USE ONLY
i i.
ULAbSI~ICAIIUN
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NDS OPERATIONS PROCEDURE MANUAL SYSTEMS SOFTWARE & HARDWARE
NO. P-D006 5 November 1985
PACK INITIALIZATION (DPREP)
PURPOSE
1. There are several types of DPREP available on the NDS. This document
sets forth the procedures to be used when intializing a disc pack on the
operational or the M&A systems.
REFERENCES
2. Sperry/Univac Series 1100 Executive System, Operator Reference,
UP-7928.8 Appendix E., DPREP 1100, pages E-1 through E-22 (current version).
RESPONSIBILITIES
3. The Shift Supervisor or the Assistant Shift Supervisor is responsible
for carrying out this procedure under the direction of an Operations Control
Officer.
4. PREP33 - Used on the M&A System only
* Used on the DCE, DCF, DCG, and DCH strings only which are Sperry
8433 disc drives. The DCI string, also on the M&A System, are
Amperif 8470 fixed disc drives. These drives require a special
prep and will not be documented in this procedure. If a prep is
ever needed for these drives, SPB will assist Operations with the
prep.
5. PREP34 - used on the operational System only
* Used on the DCA, DCB, DCC, and DCD strings only which are Amperif
8434 disc drives.
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PROCESSING
6. PREP33
a. Before starting the DPREP, put the pack being prepped into a spare
drive and reserve (RV) that drive.
b. T DPREP (Operator keyin)
c. 0-ENTER PREP PARAMETERS (DPREP prompt)
d. 0 PREP33 DHO T4 (Operator keyin)
* DHO = drive T4 = type T4 is the most commonly used type.
Unless directed otherwise by SPB, OSG T4.
e. LOAD DHO DHO DPREP
f. FA DHO
FA = Forced Acknowledge
g. DHO RV * R PACKID DHO
(DPREP response)
(Operator keyin)
(DPREP response)
The next two DPREP prompts (h'& 3) will come up only if a pack
that has been used before is being prepped.
h. O=ADH ACCESS OK RUN PACK XXXXXX YN? (DPREP prompt)
XXXXXX is the current label on the pack. The pack label name will
appear in place of XXXXXX.
1. 0 Y (Operator keyin)
J. 0-ALLOW XXXXXX AS SUBSTITUTE PACK ON DHO YN? (DPREP prompt)
k. 0 Y (Operator response)
1. 0-MORE? (DPREP prompt)
Let this delay sit until later.
m. 1-PREP33 DHO IS C.U. ON A WORD CHANNEL? YN (DPREP prompt)
n. 1 Y (Operator response)
o. DHO ID XXXXXX, PREVIOUS PREP FACTOR = 0112 (DPREP response)
p. 1-DHO, FILES WILL BE DESTROYED, CONTINUE? YN (DPREP prompt)
q. 1 Y (Operator keyin)
ADMINISTRATIVE-INTERNAL USE ONLY
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r.
1-DHO, PACK TYPE & LABEL? FXXXXXX,RXXXXXX
DPREP prompt)
F = Fixed pack; R = Removable pack; XXXXXX = Six Char. pack name
s.
1 FMMFXOO or 1 RMMRMOO
The two names (FMMFXOO and RMMRMOO) used are
whatever name is required at the time.
(Operator keyin)
just examples. Use
t. 1 DHO ID MMRMOO, PREP FACTOR? 28, 56, 112, 448 (DPREP prompt)
u. 1 112 (Operator keyin)
112 is always used. At this point, the prep will take place. It
will run about 20 minutes. When it is done, it will send out the
next prompt.
a. Before starting the DPREP, put the pack being prepped into a spare
drive and Reserve (RV) that drive.
b. ST DPREP (Operator keyin)
c. 0-ENTER PREP PARAMETERS (DPREP prompt)
d. 0 PREP34 DDO T4 (Operator keyin)
* DDO = drive, T4 = type; T4 is the most commonly used type.
Unless directed otherwise by SPB, use T4.
e.
LOAD DDO DDO DPREP
(DPREP response)
f.
FA DDO
(Operator keyin)
FA = Forced Acknowledge
g.
DDO RV * R PACKID DDO
(DPREP response)
h.
0-MORE?
(DPREP prompt)
Let this delay sit until later.
i.
1-DDO, PACK TYPE & LABEL? FXXXXXX,RXXXXXX
(DPREP prompt)
F = FIXED PACK; R = REMOVABLE PACK; XXXXXX = SIX CHAR. PACK NAME
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J. 1 FNSFXOO or 1 RNSRM00
(Operator keyin)
The two names used are Just examples. Use whatever name is
required at the time.
k.
1 DDO ID NSFXOO, PREP FACTOR? 28, 56, 112,
448
(DPREP prompt)
1.
1 112
(Operator keyin)
m.
1-DDO ID NSFXOO PREP T4 TO USE ALTERNATE
TRACKING? YN
(DPREP prompt)
n.
0 N
(Operator keyin)
At this point, the prep will take place.
It will run about 20
minutes. When it is done, it will send out the next prompt.
o.
1-DDO ID NSFXOO, END ON LAST POS BOUNDARY? YN
(DPREP prompt)
p.
1 Y
(Operator keyin)
q.
1-DDO ID NSFXOO, SELECT DIR TRK? N,CXXX HXX
(DPREP prompt)
r.
1 N
(Operator keyin)
s.
1-DDO ID NSFXOO, ADD DIR TRACKS? N,X(X=1-7)
(DPREP prompt)
t.
1 N
(Operator keyin)
u.
PREP34 DDO PREP T4 COMPLETE
(DPREP response)
ANSWER OUTSTANDING DELAY WITH N OR PARAMETER
(DPREP response)
At this point you can either continue with another pack by entering the
parameters (see d.) or answering N which will end the prep.
8. Sperry/Univac Series 1100 Executive System, Operator Reference,
UP-7928.8 Appendix E., DPREP 1100, pages E-1 through E-22 (current version).
ADMINISTRATIVE-INTERNAL USE ONLY
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U VAT! LEVEL $'*'"
Appendix E. DPREP 1 100
E. 1. Online DPREP 1100
The DPREP 1100 software contains eight features. This software does an absolute assign of a
reserved ( RV ) disk unit.- To initiate a prep the pack must be mounted on a serviceable unit that is
in the RV state. The system file *SYS$*RUN$ should also contain the runstream to start the prep,
and the system file SYS$*LIB$ should contain the DPREP 1 100 absolute element There are unique
DPREP 1 100 absolute elements for each of the major Series 1 100 System groups. The elements
used for prepping are DPREP80 (1100/80), DPREP60 (1100/60).
The following subsections describe the eight prep features.
E 1.1. Type 1: Write Home Address
The Write Home Address feature writes home addresses on a pack that does not have formatted
tracks; i.e., the pack contains only index marks or the home addresses have been obliterated. The
prep writes only the home address on each physical disk track; no records are formatted for Executive
use. If the home address cannot be written, the track is skipped upon operator request. Performing
the prep on an EXEC formatted pack destroys the data information contained on the pack but it does
not destroy any bad track flags. If the home address is unreadable, the operator must rewrite the
home address to obtain skip displacement and bad track capability. If the home address is not
rewritten; the home address is flagged bad in the bit map. Warnings are provided to prevent
inadvertent destruction of the data.
The Write Home Address feature is used for 8470 disks only when so many home address fields are
destroyed that it is not feasible to allow selective track formatting.
Type 1 prep is not available for Solid State Disks.
E.1.2. Type 2: Print Bad Track History
Prerequisite: The pack must be a factory-certified pack or prep Type 3 or a Type 5 must have been
performed previously. Type 3 is not available with word channel control units or 8450-94/95
(Compatible mode only) drives.
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The Print Bad Track History provides hard copy listing that designates the tracks that are flagged as
defective and the origin of the bad track flag. There are five kinds of defectively flagged bad tracks:
flagged defective onsite; reserved for PTS testing; factory-certified defective; tracks flagged bad
because the home address cannot be written; and unavailable track (8450 and 8470 only). This
feature performs read-only functions and does not after any information on the pack.
Type 2 prep is not available on Solid State Disk
E.1.3. Type 3: Track Dropout (5039)
The Track Dropout routine destroys any data that is contained on the pack. Warnings are provided
to ? prevent inadvertent destruction of data. The operator is queried (solicited). using a menu of
selections for this operation. Automatic badspotting can also be used, depending on what the
operator selects. A printout is provided of all tracks that fail to support data. If automatic badspotting
is not selected, defective tracks may be flagged using Prep Type 5. Data analysis is not performed
on tracks that were flagged defective previously. This type is not available on the word control units,
and 8450-94/95 (Compatible mode only) drives.
Type 3 prep is not available on Solid State Disk.
E.1.4. Type 3: Skip Generation (5046, 5056 Control Unit and 8450-94/95 Disk Only)
The Skip Generation routine generates skip displacements for the hardware to use; it allows the
hardware to ignore imperfect areas on the disk surface. Up to three skips may be generated for a
track without needing to down the track. A Type 4 prep must be used following a Type 3 prep.
E 1.5. Type 4: New Prep
Prerequisite: Defective tracks should have been flagged previously by factory certification, or by
performing a Type 1 prep, or a Type 3 prep. (Note the above restrictions.) If a Type 1 prep has resulted
in a skipped home address, the. appropriate track is flagged, bad or unavailable in the bit map.
Warnings are provided to prevent inadvertent prep of a previously EXEC formatted pack. The New
Prep (Type 4) solicits information from the operator at the console. The solicited information includes:
the pack label; prep factor, location of the directory track; and additional directory tracks. -
Note that when prepping a track, the New Prep routine reads the home address and track descriptor
record (RO). Only if these are read without encountering the defective track indicator in the home
address is the prep, of the track actually performed. -if the home address is unreadable, it is flagged
bad at the operator's request. The bad track is indicated in EXEC hardware and software bit maps.
For 8434, 8450, and 8470 disks that are used on 5046/5056 control units, the new (or full) prep
may be run in either of two modes; the mode is selected by the operator's response to the follwing
message:
0 - devnam ID pack-id -PREP T4 TO USE ALTERNATE TRACKING? YN
A Y response results in DPREP 1100 formatting defective tracks in such a way that an alternate
tracking access mechanism can be used by the 5046/5056 control unit logic. This is described in
E 1.5.1. An N response results in DPREP 1100 formatting defective tracks in a nonaltemate tracking
(more traditional) manner, described in E 1.5.2.
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E.1.5.1. Alternate Tracking
Each physical disk track has a 'header' section, which normally cannot be addressed by a user
program. It contains addressing and status information. A track may be marked as defective in a
'flag' byte of the header section.
The alternate tracking concept provides that a disk track marked as defective may be formatted to
cross--reference another track (non-defective) that is used as its alternate. The cross-referencing and
indirect accessing of data then proceeds in a manner entirely transparent to both the user program
and the Executive System.
Alternate tracking restrictions in DPREP 1100:
^ Not used to or from CE or PTS-reserved tracks.
^ Not used on 8450-02 or 8470-02 fixed heads.
^ Alternate tracks flagged as defective will not have alternates (the indirect access is one level
only).
Alternate tracking advantages:
? For a given disk type there is a guaranteed amount of storage space available.
2 Factory-certified defective tracks may point to alternates.
? Any disk may be prepped for disk resident system use. (Without alternate tracking, any disk
having defective tracks in the bootstrap area must be rejected for DRS use.)
? Required for using disk copy.
One possible disadvantage of alternate tracking is that a small portion of the disk surface (less than
one percent) is reserved for alternate tracks.
These reserved areas are as follows:
^ 8434 - Cylinders 878-884 inclusive.
S 8450 - Cylinders 555-559 inclusive.
^ 8470 - Cylinders 625-629 inclusive.
As indicated in E.1.5, the DPREP 1100 setup of alternate tracking format is initiated by operator
response to a console query. The site technical management decided whether alternate tracking will
be used.
E.1.5.2. Nonalternate Tracking
When the full prep is run in this mode, the pack is reprepped without destroying bad track history.
Factory-certified defective tracks are never reprepped. When any other track is flagged as defective,
the software writes the RO with a 4-byte data field specifying EXEC in ASCII. This allows a reprep
of a software marked defective track and uniquely identifies those tracks marked as defective by the
manufacturer and by the software. In addition to writing the home address and RO, the remaining,
portion of the track is erased. Also, the EXEC hardware and software bit maps are updated to reflect
the bad track.
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UPDATE LEVEL ?-t;E
In this mode, a Type 4 prep on an 8450 or 8470 disk drive requests the size at which the pack should
be prepped:
0 - devnam ID pack-id PREP T4 PREP STANDARD SIZE? YN
A 'standard size' prep will prep the pack and mark the tracks on five cylinders as unavailable. These
tracks, then, will automatically be allocated for any defective tracks found elsewhere on the pack. A
'nonstandard size' prep will prep the entire pack, less any defective tracks.
The 'standard size' prep is not available for 8434 disk packs.
E.1.6. Type 5: Partial Prep
The partial prep provides the user with the alternatives described below. If applicable, these may
be used instead of a Type 4 prep.
Reinitializing returns a pack to the newly prepped (Type 4) state. The pack must have been
originally prepped using the Type 4 prep, either with or without the alternate tracking format
(see sections E 1.5.1 and E. 1.5.2). Reinitialization rewrites the Software Master Bit Table (SMBT)
with the Hardware Master Bit Table (HMBT). This process destroys reference to user data files
as though a Type 4 prep had been run.
? Change pack type identification.
NOTE Disk type (fixed or removable) or disk identifiers should not be altered after system
registration occurs.
These options are provided for quick disk replacement of disabled disks, or if an incorrect
pack-id or type (F or R) is entered during a Type 4 prep.
Quick disk replacement of disabled disks keeps a prepped pack that is unregistered and free
of files on the shelf. If the need arises, this pack can be used to replace a disabled disk by
changing the type.(F or R) and duplicating the pack-id that is disabled. The new pack can be
reloaded without performing an entire Type 4 prep.
E Change individual track status without full pack reprep.
Track status (up/down) may be changed on either prepped (operating system formatted) or
unprepped disk packs. This enables the operator to up or down a track without disturbing other
data files.
DPREP 1 100 will issue the console message:
0 - devnam ID pack-id UP/DOWN TRK? N,Uxxx-xx,Dxxx-xx
An 'N' response will, of course, terminate this mode.
Otherwise, a message appears, if the following two conditions are met
^ The unit is an 8434, 8450 or 8470 unit
? The operator response does not reference a CE- or PTS-reserved track or a fixed head area on
8450 or 8470.
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i he message is:
0 -? devnam ID p~-k-id PREP T5 TO USE ALTERNATE TRACK NG? YN
(Operators and other site personnel should `ami;barize thernseiva with the concept of alternate
tracking as described in E.1.5.1. 5046/5056 control units.)
When the operator specifies that a track is to be downed (a cylinder-bead combination) and also
answers .Y' to the alternate tracking query, DPREP 1 100 will normally proceed as follows:
C3 The flag byte of the referenced track marks the track as defective.
N An alternate for the referenced track is chosen from the area of potential alternates (see
addresses, E. 1.5.1). If no more are available, the operator is informed of this by a system console
message and the request is serviced in nonaltemate tracking mode.
^ The alternate track is marked as an alternate in its flag byte.
? The defective-alternate pair of tracks is setup (in the header addressing areas) to cross-reference
one another.
? The alternate track is prepped for use.
? In the master bit tables, the defective track is Marled available or system use) and the alternate
track is marked unavailable.
The preceding list describes the basic work of DPREP 1 100 alternate tracking and is the 'definitive
case' for its use.
Other situations may occur that involve the alternate tracking process, but where the operator request
must be treated differently.
III The down keyin references a potential alternate track; the track is marked defective with no
alternate track of its own
? The down keyin references an alternate track that is already cross-referenced to a defective
track. If the defective track is marked allocated in the software master bit table, a warning
message appears on the system console; the operator must key in consent before the request
is processed. Otherwise, a new alternate track is provided and the referenced track is marked
defective with no alternate track of its own.
The down keyin references a defective track that is already cross-referenced to an alternate
track; the situation is identified by a system console message, but no further action is taken.
An up keyin references a primary track that is not cross-referenced to an alternate; the defective
bit in the flag byte is cleared, and the track is marked as available in the master bit tables. (The
term 'primary' is used to describe a track located outside the disk area reserved for alternate
tracks.
^ An 'up keyin references a defective track already cross-referenced to an alternate track; both
primary and alternate are returned to 'ready' status; i.e., defective and alternate bits are cleared,
cross-referencing is removed. and the alternate is returned to the pool of available alternate
tracks.
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An up keyin references a potential (i.e., availablei alternate track. It the operator responds 'Y'
to the alternate tracking query, the operator receives a warning message but no further action
is taken. Otherwise, the track is 'upped' as always, defective and alternate flag bits are cleared,
tt;e track is prepped for system use, and master bit tables are marked accordingly.
? An up keyin references an alternate track that is already cross-referenced to a detective track.
A system console message appears but no further action is taken.
NOTE- In all cases where the master bit table reference can be changed, to already-allocated
customer data, DPREP 1 100 will query the operator. The operator must respond with the
appropriate console keyin before DPREP 1100 will proceed.
Before the Type 5 prep can use alternate tracking on 8450 or 8470 disks, either of the following
must have occurred:
2 A successful Type 4 prep that specified use of alternate tracking was run on the pack, (see
E.1.5.1).
b A successful Type 4 prep that specified PREP STANDARD SIZE was run on the pack, (see E.1.5.2).
Before alternate tracking can be used by the Type 5 prep on 8434 disks, a successful Type 4 prep
that specified use of alternate tracking must be run.
If the following Type 5 prep console message receives an 'N' response from the operator. DPREP
1100 formats defective tracks in a nonaltemate tracking (more traditional) manner, as described in
E. 1.5.2.
O - devnam 10 pack-id PREP T5 TO USE ALTERNATE TRACKING? YN
Disk track repreps are inhibited under the following conditions:
1. A keyin requests upping of a track that factory certification flagged defective.
2. The control unit signifies an unsuccessful reprep.
3. The reprep will alter the physical track 0 (VOL 1). the directory area, or a reserved EXEC area.
If customer data resides on the affected track, an operator decision is required if the track will be
flagged defective.
Information from error log programs may be used for input when operating a Type 5 prep. This allows
permanent badspotting of tracks that have a history of recoverable data errors before the errors
become unrecoverable.
To maintain a standard size 8450 or 8470 type disk, a track that resides in the unavailable area (84 50,
cylinders 555-559; 8470, cylinders 625-629) must be marked up whenever a track that resides in
the standard area The operator can accomplish this using an 'Uxxx-xx-' keyin. an additional console
kevin.
Messages are provided for the inhibited areas because the reprep is not allowed.
Type 5 prep is not available on Solid State Disk.
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E.1.7. Type 6: Prep Verify
Prerequisite: The pack must have previously been prepped in EXEC format.
The Prep Verify routine performs data write, read, and verify by mass storage track format in areas
where no customer data is residing. For areas where VOL1, Directory Track and customer data is
residing, the routine performs two reads; it compares the first read with the second read for data
verification. This routine may be used on any previously prepped EXEC format packs. The Type 6
Prep Verify does not alter the pack data nor does it mark tracks as defective when the data has a
compare discrepancy. The operator may use a Type 5 prep to down any tracks that are found
defective by the Prep Verify routine.
Type 6 prep is not available on Solid State Disk
E1.8. Type. 7: Disk Resident System (DRS) Prep
Prerequisite: The Type 7, DRS prep routine must follow a Type 4 prep when formatting the pack for
the disk resident system (DRS). The DRS Prep is inhibited when either defective tracks or customer
data resides in the area that will be reserved for the DRS area. If any such defective tracks are
cross-referenced to alternate tracks, then the restriction may be removed.
For DRS packs prepped on 5046 and 5056 control units, the format of cylinder 0, head 0, is the same
as for any other pack prepped on the control unit. The Initial. Program Load (IPL) block starts with
the record following VOL 1 (i.e. record 4) and continues across any subsequent records for 20008
words. The difference between DRS and non-DRS packs that are prepped by the word control unit
is a flag in VOL 1. The flag prevents data corruption that can occur because the operator inadvertently
boots to the wrong pack Disk packs are not compatible between word channel and byte channel
control units for Initial Program. Load (IPL) operations.
Type 7 prep is not available on Solid State Disk.
E1.9. Type 8: Print VOL1 And Directory Track
If the disk is prepped in EXEC format, the Type 8 feature provides a hardcopy listing of VOL1 and
the first directory track. It provides the user with complete information on file status and defective
tracks on the disk; these are represented by bits located in the hardware and software master bit
tables within the directory track.
In addition, the operator may print the data in any area of the disk (except CO HO on DRS prepped
disks) by.responding to an answerable console message with the appropriate cylinder and head
keyins. Attempts to print tracks on unprepped disks may result in status errors because of attempts
to read records that do not exist Records that are readable, however, are printed.
E.1.10. Recommended Use
This section describes recommended use of a DPREP 1 100 for common situations.
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To prep ? pacx '.na* !1as not been Previously prepped by DPREP 1 100 (new pack):
Perform a Type 1, Type 3. and Type 4 prep. Type 3 is not available on word channel and
compatible mode 8450 units.
3. Perform a Typa 5 prep to down tracks that present data related errors during operation of a
4. Perform Typo 2 prep to obtain a new list of defective tracks.
The operator must perform a Type 1 prep on all new (from the manufacturer) packs to destroy any
alternate track flags that may have been written to support tracks found defective. If the operator
does not do this, the Operating System will encounter track condition checks when accessing these
tracks.
NOTE' A Type 1 prep should not be performed for 8470 disk packs except as noted in E 1. 1.
E1.10.2. Prepping Previously Prepped Packs
To prep a pack previously prepped by DPREP 1100:
1. Perform a Type 4 prep.
2. Perform a Type 6 prep.
3. Perform a Type 5 prep to down tracks that present data related errors during operation of a
Type 6 prep.
4. Perform a Type 2 prep. to obtain a new list of defective tracks.
E.1.10.3. Prepping a New Disk Resident System (DRS) Pack
To prep a DRS pack that has not been previously prepped by DPREP 1 100 (new pack):
1. Perform a Type 1, Type 3. and Type 4 prep. Type 3 is restricted in that it is not available on
the word channel control units. For 8470 disks, perform a Type 3 prep and a Type 4 prep.
3. Perform a Type 5 prep to down tracks that present data related errors during operation of a Typ;-i
6 prep. If defective tracks exist in the area that will be reserved for DRS use, a Type 7 prep
will be inhibited.
5. Perform a Type 2 prep to obtain a new list of defective tracks.
The operator must perform a Type 1 prep on all new (from the manufacturer) packs to destroy any
alternate track flags that may have been written to support tracks found defective. If this is not done,
the operating system will encounter track condition checks when accessing these tracks.
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V'OATt LEVE. PAGE
NOTE: A Type 1 prep shouid not be performed for 8470 disk packs except as noted in E 1. 1.
E.1.10.4. Previously-Prepped Disk Resident System (DRS) Pack
To prep a DRS pack that has been previously prepped by DPREP 1100:
1. Perform a Type 4 prep.
2. If a list of known defective tracks is available, the operator should'also use a Type 5 prep. If
defective tracks reside in the area that will be reserved for DRS use, a Type 7 prep will be
.inhibited.
3. Perform a Type 7 prep.
4. Perform a Type 2 prep to obtain a new list of defective tracks.
E1.10.5. Defective Track Reprep
To reprep a previously-suspected defective track, perform a Type 5 prep, upping the suspected track.
E.1.10.6.. Downing a Defective Track
To down a defective track
1. Perform a Type 5 prep, downing defective track.
2 Perform a Type 2 to obtain anew list of defective tracks.
E1.10.7. Testing for Additional Defective Tracks
To test a prepped pack that is suspected of having additional but available defective tracks, perform
a Type 6 prep. This will not destroy the pack contents.
E1.10.8. Reading Suspected Area of Pack
To read a suspected area of a prepped pack and/or to read VOL1 and the first directory track of a
prepped pack, perform a Type 8 prep. If desired, the operator should supply the cylinder, head of
the area .will be read.
E1.10.9. Surface Analysis.
Surface analysis is not available on the 5046 and 5056 control units.
To do a complete surface analysis of a pack that the operator suspects is unable to retain data:
1. Perform a Type 1 prep, and Type 3 prep. Type 3 is restricted as noted.
2. If the pack is usable, the operator should restore it using a Type 4 prep.
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E. 1.10.10. Skip Defect Generation
Skip Defect is available only on 5046, 5056, and 5057 control units and 8450-94/95 disk.
1. Pack must be prepped via a Type 4 prep.
2. Perform a Type 6 prep to locate any suspect tracks.
3. Perform a Type 3 prep on suspect tracks only.
4. Perform a Type 4 prep to re-prep the pack.
E.1.1O.11. Prepping an SSD Pack
1. Perform a Type 4 prep.
2. Perform a Type 8 prep to snap on directory track and any desired track.
A runstream is contained in SYS$*RUNS that may be started using a Start (ST) keyin.
ST DPREP
To initiate a prep, the runstream contains a call to @DPREP. Since @DPREP, which is in SYS$*LIB$,
does an absolute assign, the operator must mount the pack on a reserved (RV) unit. The account
number/user-id must be correct to pass the absolute assignment checks of the Executive.
Before allowing any absolute assignment of a previously prepped pack, the operator must respond
'r to the following console messages:
0 - ALLOW pack-id AS SUBSTITUTE PACK ON devnam YN?
0 - ADH ACCESS OK RUN run-id PACK pack-id YN?
Operator approval and the correct account number/user-id are necessary for using DPREP.
E.3. Summary of DPREP. 1100 Messages
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E-1 1
U'DATE LEVEL PAGE
Message
Description/Response
ST DPREP (unsolicited keyin)
Initiates runstream to load PT5 software
ENTER PREP PARAMETERS
Respond with
0 PREP xx devnam T x (xxxxxx) . cccc
where:
PREPxx PREPOS - for 8405 type drive
PREP30 - for 8430 type drive
PREP33 - for 8433 type drive
PREP34 - for 8434 type drive
PREP50 - for 8450 type drive
PREP70 - for 8470 type drives
PREPSA - for SSD drives
devnem Operating system's mnemonic name for
the device to be prepped.
Tx Type number
TI = Write Home Address
T2 - Print Bad Track History
T3 = Surface Analysis t
T4 - New Prep
T5 - Partial Prep
T8 = Prep Verify
T7 = DRS Prep
T8 - Print VOI1 and Directory Track
NOTE t Surface analysis is not available on
some control units (see E 1.3.1L
Multiple keyins are allowed: e.g.,
T4,6 Type 4 and Type 6 will be
performed
T4,8,7 Types 4. 6, and 7 will be
performed
Types are performed in numerical order
(xaaxxx/ 8 character, pack-id. If pack-id is not
included in prep initialization, a default
pact-id consisting of devnam without
special characters is substituted.
cccc Control unit type (5039. 5048, or 5056)
Applicable to 8405. 8430. 8433
LOAD (pack-id)
Mount pack to be prepped on reserved drive. (If 8405,
load message not used.)
FA davnam. (unsolicited keyin)
Generates attention interrupt. (Not required for 8405)
ALLOW pack-id AS SUBSTITUTE PACK
0 Y Prep will proceed.
ON devnam YN?
0 N Pack assign is inhibited.
ADH ACCESS.OK RUN (run-id) PACK (pack-id) YN
0 Y Direct pack assign is allowed.
ON. Pack assign is inhibited
25X1
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E-12
U A E U NU rAGa
Message
Description/Response
MORE?
Message remains on console screen; additional parameters
may be entered to start preps on additional drives.
0 N No additional parameters. Further
parameters cannot be entered, and the
DPREP run will automatically 'FIN' when
current prep activities are completed.
0 PREPxx detnnam Txx (xv=xl - To start additional
preps-
ANSWER OUTSTANDING MESSAGE WITH N OR
All requested prepping activities have completed, and the
PARAMETER
'MORE?' message is still outstanding.
11 nop-id (unsolicited keyin(
Allows entry of additional parameters after the 'MOREP
message has been answered with 'N'.
PRPPxx devnam, IS C.U. ON A WORD CHANNEL? Y,N
Applicable to 8405, 8430. 8433 disk drives, and wiN
appear if the control unit type is omitted on the initialmng
parameter.
PREPxx downs,. WHAT IS THE CONTROL UNIT TYPE?
Applies when the 'W was entered for the previous
question.
05039 Enter for 5039 control unit
0 5040 Enter for 5040 control unit
0 5046 Enter for 5046 or 5056 control unit
05056 Enter for 5048 or 5058 control unit
0 5057 Enter for 5057 Control Unit
E3.2. Other Necessary Messages by Feature Type
See Table E-2 for other necessary messages by feature type.
Table E-Z Other Necessary Messages by Feature Type
Message
Description/Response
PREP TYPES 2. 7
No solicited messages.
TYPE 3 PREP
Restricted as noted
PREPxx devnam, WANT AUTO SADSPOTTING?
0 Y Data verify errors will cause track to be
TN
flagged defective.
0 N Data verify errors will be output to system
HSP.
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I UPOATE LEVt3
E-13
PAGE
Message
Description/Response
PREPxr devnam, ENTER 12 CHARACTER
0 pppppppppppp.Characters entered (0-9) will be used
PATTERN OR N
for data verify.
0 N
Default pattern of 777777777777 will be
d
PREPxx devnam NO TYPE 3 ON CU, CONTINUE?
0 Y
use
.
Continue other selected features.
Y,N
0 N
Prop termination
TYPE 3 PREP - Skip Defect
PREP xx devnam, SETA INPUT OR AUTO? S OR A
S
Sela input - user may enter skip defect:t
A
Auto - DPREP will generate and insert up
to 3 skip defects.
If response is A
ENTER Cxtx HxxxOR N
It cylinder and head are not included on prop initialization,
they will be solicited.
O N
test will complete
Cxcr Hxa
cylinder and heed to test
If response is -S
ENTER Cxxx HwOR N
0 N
test will
complete
Cxa Hw
cylinder and head to test
ENTER S87 xxx (3 OCTAL DIGITS) OR N
w
587 information
O N
solicit new cylinder and head
ENTER S812 xxx (3 OCTAL DIGITS) OR N
xsr
S812 information
O N
solicit now cylinder and head
ENTER SB18-19 xccrxx (6 OCTAL DIGITS) OR N
xxrxu
SB18-19 information
O N
solicit new cylinder and head
TYPE 4 PREP
devnam PACK TYPE AND LABEL?
0 Fxxoxr
F- Fixed pact, x -up to 8
Fxxxxxr,Rxxv=
character alpha/numeric
label.
O Rxzx xt
R-Removable pack x-up to
6 character alphanumeric
label.
If 8405 disk drive:
devnam. FIXED DISK LABEL?
Fs~atxxx
devnem ID ww PREP FACTOR? 28, 56, 112
xxxxxx
Pack label
0 28
Pack prop factor.
0 58
0 112
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F-78
UPDATE Lt' re:,F
Message
Description/Response
If 8434, 8450 or 8470 disk drive on 5046/5056 C.U.
devnam ID xzzzrz, PREP FACTOR?
xxxrxx
Pack label.
28, 56, 112. 448
0 28
Pack prep factor.
0 56
0 112
0 448
NOTE
448-iwrd prep is not to be selected if the
pack is a fixed pack or DRS pack or drive
is B450-94/95 /Compatible mode ontyt
if 8450 Disk on 5057 control unit
devnamlDxarxx PREP FACTOR?
xwxx
pack label.
28.56, 112. 448
0 28
prep factor
058
0 112
0 448
NOTE
448 prep factor is allowed on fixed
removable, or DRS pack under 5057
control unit
If 8450-94/95 disk
devnemIDaarzr,PREP FACTOR?
rramr
pack label
112.448
112
prep factor
448
NOTE
448-wo d preps not to be selected if Dire
pack is a fixed or a DRS pack
If 8470 disk on 5057 control unit
devnamlDxxxxzr,PREP FACTOR?
zzzzxx
pack label
28, 58, 112. 448, 1792
28
prep factor
58
112
448
1792
NOTE
448 prep is not allowed on fixed pack or
DRS pack 1792 prep is allowed on all
types of 8470 past
N 8450 or 8470 disk drive:
--W# devnam ID xzcaz, PREP STANDARD
zzXoar
Pack label.
SIZE? Y N
0 Y
Prep the entire 8450 but limit the usable
size of the disk to the standard number of
cylinders (555}, Use all physical tracks
contained in cylinders 0 through 554, plus
enough additionsi tracks in cylinders 555
through 559 to maimain the standard size.
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E-15
Table NT. Omer Vecasssry Messages by Feature Type iconrinued)
Message
Description/Response
0 N
Prep and make available all physical tracks
on cylinders 0 through 559 except those
tracks which are marked defective.
NOTE
The fixed storage area. available on
8450-02/03 disks, is always used
H 8405, 84-70, or 8433 disk drive:
dernarn ID unit. ADD PTS RESERVED
.rxxxaar
Pack Label.
TRACKS? Y,N
0 N
Do not add PTS test tracks.
0 Y
Allow inclusion of PTS test tracks
devnam ID xxzw SELECT DIR TRK?
wrest
Pack label.
N.Cxxx Has
0 N
Directory Track is placed 1/3 of
way into pack.
0 Cxxx
Cxxx (decimal cylinder).
0 Has
Hxx (decimal head).
Directory Track is placed at first
unallocated sector-formatted track in
requested cylinder/head area.
If 8434, 845000/01, or 8470 disk drive on word
control unit:
devnem ID xxxa= END ON LAST POS
XXM=
Pack label.
BOUNDARY? Y,N
0 Y
Allocates remaining tracks past the last full
position on unit.
0 N
Leave remaining tracks past the last full
position unallocated.
devnam ID naorw ADD DIR TRACKS N,c
rsu:cr
Pack label.
0 N
One Directory Track on pack.
0 x
x :(1-8) Additional Directory Tracks.
If 8434 or 8450 disk drive:
devnam ID xxxx= ADD DIR TRACKS? N,x (a
1-7)
If 8470 disk drive:
.devnam ID uuu ADD DIR TRACKS? Nac (x
1-4)
TYPE 5 PREP
devnam ID uuu, REINITIALIZE (REPREP) DISK?
xx- -
Pack label.
Y,N
0 N
By-pass reinitialize.
0 Y
Allow reinitialize.
DATA WILL BE DESTROYED IF PACK xxxx=
RE-PREPPED
devnam, CONTINUE PREP T 5? Y,N
0 N
By-pass reinitialize.
O Y
Continue reinitialize.
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U/t`.ATf t.EYSS ? P CA
Table E-2. Other Necessary Messages by feature Type (cononuedl
Message I
Description/Response
devram 10 xxxxxx. CHANGE ID OR TYPE? Y.N
xxxxxx
Pack label.
O N
No change
0 Y
Allow changes of pack. type or ID.
devran, PROVIDE NEW PACK ID.
0 Fr===r
F - Fixed pack. x = up to 6 character
Fxxxxzt, Rxxxxxx
alphanumeric label.
0 Rxxxac~r
R - Removeable pack. x - up to 6
character alphanumeric label.
devnam ID x rxxxx UP/DOWN TRACK?
xromo<
Pack Isbell.
N,Uroa-xx. Dusa-rot
O N
Terminates prop Type 5.
0 Umt-rot
To up a physical track.
0 Dxxx-xx
To down a physical track.
where:
x=-decimal cylinder
r
.
-seperatp
ax-decimal head
TYPE 6 PREP
davnam ID mwyoor CYL/HD RNGE? Cm-x=
nova=
Pads label or none.
Wok-xx.4LL
0 ALL
Entire-disk surface is tasted
0 Cxxa-roe Hxx-arc - Select start and
end cylinder and head to be
t
d
este
.
NOTE
Example C 100-200 NOO-18, decimal head
O through 18 are tested on decimal
cylinders 100 through 200.
PREPxx devnsm, ENTER 12 CHARACTER
0 pppppppppppp - Character entered (0-9) will be used
PATTERN OR N
for data verify.
0 N
Default random data pattern will be used.
TYPE 8 PREP
devnam ID xxxxxz, SNAP TRACK TO HSP? N,
0 N
Terminates Prep Type 8
Cxxx Hxx
0 Cxxx Hoc
Specifies disk track to be printed
If the track is good, the track's home
address and records are printed If the
track is flagged defective, the tract's home
address and RO are printed.
davnarn ID wr.r SNAP SSD TRACK TO HSP? N. Tx=
0 N
Terminates Type 8 prep,
wxczwxx
0 Tx=
Specifies FASTRAND track to SNAP printer.
Range = 0-511.
0 wzcomor
Track containing given word will be
snapped Range >? 0-917.503.
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Fcliiowing the c uG r;;. T ,... i 2:iturt, nr H ., ifiE. iTiiow '1C r-e5 Gi3S rs GiSCi~VPf'
PREPxx Cevnsm Tx;. CCMPLt1:.
The preceding message indicates 3uccestui completion of the. D?REP routine.
PREP,.x devnan Txx' ABNORMAL 1 ZRMINATION
This second message indicates unsuccessful completion of the PREP routine. The user should
examine the printed output to determine the cause of error. 'tinter outtwt is discussed in E.C.
E.3.3. Console Response Messages
During execution of the features, console response messages due to illegal format, device status, etc.,
will be displayed. See Table E-3 for these console messages.
Ta> . L- . Coreso a Massages
Message
Description/Response
devnam INVALID PREP FACTOR
Veyin error - WDS/REC parameter is automatically
resolicited. Correct entries are 28, 58. 112. 448.
devnam IDxxxvcx PREVIOUS PREP FACTOR..xx
Informative message concerning pack profile.
devnam, FILES. WILL BE DESTROYED, CONTINUE? Y,N
0 N Prep terminates
0 Y Prep type selected continue. pack files are
lost and pack is reformatted.
devnam KEY ERROR
Keyin env. - parameters are resolicited
devnam, UNLABELED PACK - NO VOLUME 1
Pack is not prepped. or deNice is not operating correctly.
devnam, CYL NO, CANNOT READ HOME ADDRESS
Prep is terminated - cannot read home address to find
track condition.
devnam, CYL HD. CANNOT FLAG BAD TRACK
Unable to down a track.
devnam, PACKID IS ALPHA-NUMERIC ONLY
Pack ID label key in error - label is resolicited.
CYL HO. CANNOT WRITE HOME ADDRESS
Cannot write the Home Address prep of the track.
devnam CYL HD CANNOT RD HM ADRS. FLAG BAD?
YN
0 Y Notes track bad for Bit Map flag and
continues.
0 N Prep terminates
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UPDATE LEY a '^G:
Message
Description/Response
asvnam 3 TRACKS HA NOT WRITTEN. CONTINUE YN
0 Y Flags all additional home addresses that
cannot be written as bad.
0 N Prep terminates.
dervnam CYL HD HA BAD FLAG BAD? YN
0 Y Prep sets Sit Map as a hardware bad track
and logs track for printing.
0 N Prep terminates
devrram 3 UNREADABLE HA CONTINUE YN
0 Y Flags all additional unreadable home
addresses as bad in Bit Map and logs for
printing.
0 N Prep terminates
devnarn FOLLOWING TRACKS FLAGGED BAD BY
Prelude to printing program bad tracks.
PROGRAM
devnam CYL HD FLAGGED BAD IN BIT MAP
Printout of bad tracks in Bit Map that were program
defined.
PREPxor davnam REWRITE ALL HA. MAY DESTROY
Warns operator that the answering of the following
FLAG BYTES
messages could cause a condition that will destroy disk
flag bytes.
PREPxx devnam CYL HD HA UNREADABLE. REWRITE
0 Y Prep continues trying to rewrite home
YN
address field on disk.
0 N Flags as down in Bit Map.
PREPxx devnam 7 TRACKS UNREADABLE REWRITE YN
0 Y Prep rewrites this home address and all
additional unreadable home addresses that
are found.
0 N Prep terminates.
PREPxx devnam REWRITE ALL HA. WILL DESTROY SO
A warning message indicating that continuing will destroy
BYTES:
the skip displacement bytes
devnam, CANNOT READ VOL1 OR DIRECTORY TRACK
The directory area of the pack has been destroyed, or the
device is not operating correctly.
PREPxx, CONTINUE PREP TYPE? YN
0 - N Prep is aborted.
0 - Y Prop continues
devnam - CANNOT FIND UNALLOCATED AREA FOR
Area selected for the directory track is allocated and all
DIR TRK
other areas are allocated to the end of the pack surface.
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E-'.9
UPDATE LEVEL PAGE
TaDle E-3. Console Messages !continued!
Message Description/Response
devnam. INVALID PARAMETER
An invalid CYL or HEAD entry has been made.
devnam ID. CYL HD PREVIOUSLY DOWNED
Type 5 prep is attempting to mark a track defective that is
already flagged detective.
devnan; ID. CYL HD CONTAINS DATA FILE
Type 5 prep is attempting to down a track that contains
customer files.
deenam ID, CYL HD FACTORY BAD TRACK
Type 5 prep is attempting to up a track that is marked
defective by factory certification.
devnam ID, CYL ND. STATUS UNCHANGED TO
Type 5 prep did not reformat the track. Track data can be
DETERMINE REASON, SNAP TRACK VIA PREP T8
printed by using PREP Type 8.
devnam BOOT AREA CONTAINS ALLOCATED TRACKS
Type 7 prep cannot be performed due to tracks allocated
In the area required for EXEC.
darnam. 8405 PACK TYPE MUST BE FIXED
Attempt to change 8405 to removable peck during prep
Type 5.
dews" ID pack-id, DRS PACK CO HO SNAP
Attempt to snap CO HO of a DRS pack.
INHIBITED
devnam CAL PACK - CANNOT PREP
Prepping is attempted on a customer engineering
calibration pack.
PREPxx devnem, TIMEOUT. A,T
Control unit or device may be physically offline.
PREPxx devnam, READ ONLY ACTIVE. A,T
The reed-only switch at the device is active.
PREPxx devnam, INTERVENTION REQ. A.T
An error at the device has caused need for operator
intervention.
0 A - causes retry of the operation.
0 T - causes prep termination.
PREPxx devnem. ERROR MSG COUNT EXCEEDED Device Errors 50. may indicate a hardware error.
PREPxx. CONTINUE PREP TYPE? Y.N 0 Y - Prep will continue. Error-counter is sat to zero.
0 N - Prep is terminated.
devnem ID, CYL HD IS ALLOCATED
Type 5 prep is attempting to down a track which contains
EXEC files.
25X1
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25X1
t-2U
Message Description/Response
devnam REALLY WANT TO LOSE DATA ON Cx x
Cxxr H.a Physical cylinder and head address.
Hxr? Y,N
ON Traci will be left untvuchec.
O Y Track will be flagged defective, data will be
lost
run-ida devnem, TO UP/DOWN CE CYL 560 IS
A Type 5 prop was initiated on CYL 560 of an 8460 disk
ILLEGAL
drive.
PREPxx devnam, DRS NOT ALLOWED WITH 448
A Type 7 prep was attempted on a disk drive propped at
WORD PREP
448 wads per record.
devnam ID xxxxxx, Cw Hxx IS DEFECTIVE
Track to prim is flagged defective. Horne address and RO
are printed.
deenam, PREP NOT IMPLEMENTED FOR SSD PREP
Ontj Typo 4 or Type B prep can be pertonned on an SSD
prick
devrram, NN GOOD READS Cxxx Hxxx
during a Typo 3 skip defect prep a cylinder and head was
specified with no errors.
E.4. Printer Output
During or following the execution of DPREP, certain information is directed to the printer rather than
to the console. This information is either too voluminous to be sent to the console or it is feit that
hard copy of the information would be beneficial.
Output frosts Type 2 feature is printed with the following headers:
PACK ID devnam -PROFILE
WDS/REC AVAILABLE TRACKS
PACK ID TRACKS FLAGGED DETECTIVE ARE
CYL HD FLAGGED BAD ONSITE
CYL HD FACTORY CERTIFIED DEFECTIVE
CYL HD RESERVED FOR PTS TESTING
CYL HD HOME ADDRESS UNREADABLE
FIXED PACK
REMOVABLE PACK
DEFECTIVE TRACK COUNT
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1 E-21
0-DATE LEVEL ! PAGE
Output from a Type 8 feature is printed with the following header
devnam DIR TRK AS READ FROM PACK
Also, during the execution of a feature, the hardware problem diagnostic messages encountered will
be directed to the printer. A summary of these is contained in Table E-4.
Device Condition Information
Description
Disk System ConuvVDrive Informadon:
COMMAND REJECT
TAeae messages are usually provided with supporting
INTERVENTION REQUIRED
sense byte data. and status information. They portray
BUS OUT CHECK
conditions which exist at the Disk Control Unit or Device.
EQUIPMENT CHECK
Many inhibit a successful prep and may require assistance
DATA CHECK
from Customer Engineering personal to remedy.
OVER RUN
TRACK CONDITION CHECK
SEEK CHECK
COUNT AREA CHECK
TRACK OVER RUN
CYLINDER END
INVALID SEQUENCE
NO RECORD FOUND
FILE PROTECTED
MISSING ADDRESS MARKER
UNSAFE - DISC FILE MALFUNCTION
MISSING CLOCK
UNEXPECTED END OF FILE
UNSOLICITED STATUS
DEVICE NOT READY
DEVICE OFF LINE
PERMANENT ERROR
INVALID TRACK FORMAT
-WRITE INHIBITED
OPERATION INCOMPLETE
WRITE OPERATION
READ OPERATION
E.5. Offline DPREP
Information concerning the offline usage of the Prep package may be found in DA3009 (Diagnostic
Test Operations Reference).
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E.S. Wall-Clock Time for Prep Operation
E-22
UPDATE ~EM ACA
The following wall-clock time approximations for prep ooeration depend upon DPREP 1 100 being
the only activity in the system. The timings will vary depending upon the number of active runs in
the system as DPREP is working in user mode. The timings will also vary depending upon the type
of disk. These figures are approximations for 8430 disk packs. The 8430 disk preps take a longer
time; the 8405 disk preps are considerably shorter.
Type 1
15 Min
Type 1
10 Min
Type 2
10 Min
Type 2
7 Min
Type 3
20 Min or NA
Type 3
NA
Type 4
20 Min
Type 4
6 Min
Type 5
1 Min per keyin
Type 5
1 Min per keyin
Type 6
40 Min
Type 6
20 Min
Type 7
1 Min
Type .7
1 Min
Type 8
2 Min per keyin
Type 8
2 Min per keyin
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