The distribution program can be used to copy a DOS system to tape for backup. The resulting tape is a self loading tape that is simi lar to the IBM-supplied system tape. The only difference in the tapes is in the contents of the systems. The tape produced by this program has the following format:
• IPL
• Initialize disk program
• Tapemark
• IPL
• Restore program
• File identification record
• File latel information
• Disk file (DOS system)
• Tapemark
When restored to a disk pack., this tape will not only restore the system as i t was copied, but will also initialize the pack to which i t is being copied. The instructions for restoring the system to a disk are the same instructions for rEstoring the IBM-supplied system to a disk pack before performing system generation.
28 IBM S/360 DOS Sys. Gen. and Maint.
COPYING A SYSTEM TAPE TO DISK To <x>py a DOS system to tape:
• Mount the DOS system and a tape.
• The following jot control cards must be placed in the program deck between the cards containing ID numbers C208 and D208 in columns 73-76:
• Place the deck in the card reader.
/ / JOB nISCPY / / DATE 68110
/ / ASSGN SYSLOG,X'cuu',dd / / ASSGN SYSLST.X'cuu' "dd
/ / ASSGN SYSOOO,X'cuu',dd (disk)
/ / ASSGN SYS001,X'cuu' ,dd£,X'ss'] (tape) / / CONFG 001 (optional, 16K assumed) / / EXEC
Note: For the BPS description parameter (dd) see Appendix F.
• The following utility modifier card IDUSt be placed immediately following the program deck:
//bUDSb'field one of format 1 DASD file label 44-characters' Col.53
• Dial on the console the address of the card reader.
• Check the units and settings; then press the System-Reset key.
• Press the console load key.
• When the Wait light comes on, press Start and EOF on the card reader.
RESTORING A SYSTEM TAPE TO DISK
The IBM-supplied system residence tape must be copied onto a disk pack befcre system generation can be performed. The pack that is to contain the system must be initialized with a volume label and a volume table of
contents (VTOC). If the disk pack is not initialized or if the VTOC is not at cylinder 199., the pack must be initialized.
INITIALIZE DISK
The following instructions and control cards will allow the user to properly initialize his disk:
• Mount the distribution tape.
• Place the following control cards in the card reader, in the sequence shown:
IBM BPS utility Programs 29
,
Card Col. 1 Card 1 Card 2 Card 3
Card 4
Card 5 Card 6 Card 7
Card 8
Card 9
/ / JOB INTDSK
l
/ / DATE yyddd yy
=
00 to 99 decimal ddd=
001 to 366 decimal / / ASSGN SYSOPT,X'cuu' ,Ddcuu
=
channel and unit of disk drive Dd=
Dl for 2311 or D3 for 2314 / / ASSGN SYSLOG,X'cuu' ,Clcuu = channel unit 1052 / / EXEC
/ / UIDbIR,Cl
/ / VTOC STRTADR=(0199000),EXTENT=(y)
VOLlnnnnnn
/ / END
Y = nurrber of tracks allotted to VTOC in decimal (1-10).
nnnnnn = Volume serial number
Columns 42-51 are reserved for user's identification.
• Dial on the console the address of the tape unit containing the distribution tape into the CPU load address switches.
• Press Load.
• When the Wait light comes on, press start and EOF on the card reader.
• The message EOJ will be printed on the 1052 printer-keyboard when
ini tializa tion is complete. The system can then be copied on the Jisk.
BYPASS INITIALIZE DISK
If the disk has previously been properly initialized, the Initialize Disk procedure can :be omitted and the following proced.ure performed to bypass the initialize disk routine:
• Nount and ready the distribution tape.
• Place the following control cards in the card reader in the sequence sho'Nn:
Card Col. 1
Card 1 / /
l
JOB INl'DSKCard 2 / / DATE yyddd yy = 00 to 99 decimal ddd
=
001 to 366 decimal Card 3 / / ASSGN SYSLOG,X'cuu' ,ClCard 4 / / LOG
30 IBM S/360 DOS Sys. Gen. and Maint.
Card 5
Card 6
/ / ASSGN SYSIPT,X'cuu',Tz[,X'90']
cuu channel and unit z
=
2 for 9-track tape z=
1 for 7-track tape The X'90' entry is required if z=
1./ / FILES SYSIPT,l
• Dial the address of the tape drive containing the distribution tape in the CPU load address switches.
• Press Load.
• When the Wait light comes on, ready the card reader containing the control cards by pressing Start and EOF.
• The tape will forward-space past the initialization program and the following message will appear on SYSLOG:
OOOC 4000A
RESTORE A SYSTEM TAPE TO DISK
Following initialization or bypassing initialization of the disk pack, the IBM-supplied system tape can be restored to disk by this procedure:
• Do not rewind the distribution ta~e.
• Clear the card reader.
• Place the following control cards in the card reader:
Card Col. 1 Card 1 Card 2 Card 3
Card 4 Card 5 Card 6
/ /
+
JOB DISRST/ / DATE yyddd yy
=
00 to 99 decimal ddd=
001 to 366 decimal / / ASSGN SYSOOO,X'cuu',Ddcuu
=
channel and unit of the initialized diskDd = Dl for 2311 or D3 for 2314 / / ASSGN SYSLST,X'cuu',Ll
/ / ASSGN SYSLOG,X'cuu',Cl / / EXEC
• IPL from the distribution tape and press Load on the console.
• When the Wait light comes on, ready the card reader
b¥
pressing Start and EOF.• The following message appears in SYSLOG:
4444A
Type in 4 ~, and press INTERRUPT to continue.
IBM BPS utility Programs 31
I
• If the message END OF VOLUME ON SYSIPT 3777A occurs while restoring a mUltivolume file, ready the next reel on SYSIPT reply 22 and press interrupt to continue. This message will not be encountered if the second volume of a two-volume system distribution is mounted on an alternate drive assigned to SYS002./ / ASSGN SYS002,X'cuu' ,TZ
• When the job is finished, the following message is printed on the IBf'J 1052 Printer-Keytoard and the disk rack is ready for system generation:
DOS SYSTEM RESIDENCE FILE
nnnnnn RECORDS RESTORED FOR ABOVE FILE 3007
END OF JOB 3008
32 IBM S/360 DOS Sys. Gen. and Maint.