Your inconsistent use of terminology makes it difficult to fully understand
the problem.
Is the new scratch tape requested when performing the backup of
datasets that happen to be on a volume associated with some dump class? Or
does the situation occur when performing a full volume dump of the volumes
associated with some dump class?
A dump volume is a tape volume. Since you retain each dump volume for
16 days and perform your dumps every 7 days, you must have more than two.
Did you mean there are only two DASD volumes associated with the dump class?
Why do you think the dumps are performed between 0500 and 0600 when
your AUTODUMPSTART operand specifies 0300 to 0400?
Reading between the lines, I will take a stab and assume you are addressing
the issue of stacking (DASD) volume dumps on a single tape volume. I think
you are misinterpreting the purpose of the STACK(10) operand. It allows you
to place the dumps of up to ten DIFFERENT DASD volumes on a single tape
during a single dump operation. It does NOT allow you to place ten
different dumps of the SAME volume on a tape.
If you look at the description of the STACK operand in the HSM Storage
Administration manual (Chapter 36 in my 1.11 copy), you will find:
"DFSMShsm selects empty dump volumes as targets for auto or command dump."
and
"A given dump volume:
...
Never contains more than one dump copy of the same source volume.
..."
:>: -----Original Message-----
:>: From: IBM Mainframe Discussion List [mailto:[email protected]] On
:>: Behalf Of Jake anderson
:>: Sent: Thursday, May 23, 2013 2:47 AM
:>: To: [email protected]
:>: Subject: HSM option
:>:
:>: Hello All,
:>:
:>: In HSM, when we are taking backup of dump class volume, it
:>: always
:>: using scratch tape. But we want to change this configuration, so that I
:>: should use existing tape which has data rather then new scratch tape.
:>:
:>:
:>: We are doing this because we are planning to migrate our 3494 ATL to
:>: TS3400
:>: tape library . TS3400 Tape library has only 17 data cartridge slot in
:>: compare to ATL 3494 has many. So that whenever HSM takes backup in tape
:>: it
:>: should use only exsiting data cartridge until it becomes full. Once it
:>: becomes full then it should look for new scratch tape.
:>:
:>:
:>: For doing this configuration, I have made below changes in HSM parmlib
:>: member. IN parmlib definition as below for taking dump. Every Wednesday
:>: it
:>: takes dump between 5 to 6 AM.We have two dump volume in our systems,
:>:
:>:
:>: DEFINE -
:>: DUMPCYCLE(NNNYNNN /* 7-DAY DUMP CYCLE WITH DUMP */ -
:>: CYCLESTARTDATE(1992/05/17)) /* DONE ONLY WEDNESDAY */
:>: /* */
:>:
:>: DEFINE DUMPCLASS(MIGDMP /* FOR CLASS MIGDMP */ -
:>: UNIT(ATL90) /* USE ATL90 DEVICES */ -
:>: RETPD(16) /* KEEP DUMP COPIES FOR 16 DAYS */ -
:>: AUTOREUSE /* MAKE VOLUMES AVAIL FOR REUSE */ -
:>: NORESET /* DO NOT RESET CHANGE BIT */ -
:>: STACK(10) /* 10 DUMP COPIES PER TAPE */ -
:>: NODSRESTORE /* NO SINGLE DATASET RESTORES */ -
:>: FREQUENCY(5) /* MIN DAYS FROM LAST VOL DUMP */ -
:>: VTOCCOPIES(1)) /* KEEP 1 VTOC COPY DATASET */
:>: /* THIS DUMP CLASS IS FOR */
:>: /* THE WEEKLY DUMPING OF ML1 */
:>: /* VOLUMES */
:>: /* */
:>: SETSYS -
:>: AUTODUMPSTART(0300 0400)
:>: /* PROVIDE TIME TO START AUTO */
:>: /* DUMP, LATE START TIME, */
:>: /* AND QUIESCE TIME. AUTO DUMP */
:>:
:>: SETSYS -
:>: SELECTVOLUME(
:>: BACKUP(SCRATCH)
:>: MIGRATION(SCRATCH)
:>: DUMP(SCRATCH))
:>:
:>:
:>: Now I have changed this SCRATCH to SPECFIC using below commands.
:>:
:>:
:>: HSENDCMD SETSYS SELECTVOLUME (MIGRATION(SPECIFIC))
:>: HSENDCMD SETSYS SELECTVOLUME (BACKUP(SPECIFIC))
:>: HSENDCMD SETSYS SELECTVOLUME (DUMP(SPECIFIC))
:>:
:>:
:>: But still I noticed that while taking dump, HSM using scratch tape .
:>: Please provide your pointers.
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