Kees,
You explained how it works, thank you for your help.
It does not differ to much for real tapes.
I also use DEVSUP custom-defined categories for library (volume)
partitioning purposes.
Does it answer my questions? Unfortunately no. :-(
(My questions are for better understanding, education. I don't have any
problem to solve)
BTW: I also use separate categories for PRIVATE volumes, but I was told
by some IBM-er it is not needed, since PRIVATE volume can be mounted
only on Volume Specific Mount Request = by the volser. Categories are
necessary for Non-Specific Volume Request ("hey, ATL, give *some* tape
for output").
Regards
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2019-03-15 o 08:43, Vernooij, Kees (ITOP NM) - KLM pisze:
The TS7700 VTS uses categories, not in private or scratchpools. Each virtual
tape has a category.
The OS (z/OS, z/VM, z/TPF) issues a 'mount from category xxxx' when it needs a
scratch tape.
When a tape is written, the OS changes the category to 'its' private category.
When the tapemanagement system scratches a tape, it is changed to 'its' scratch
category.
These categories are defined in DEVUPxx and can be different per system or
Sysplex or OS. This way, each OS can have its own set of scratch and private
tapes.
e.g.
our Prod Sysplex has:
MEDIA1=0011,
MEDIA2=0012,
ERROR=001E,
PRIVATE=001F,
Out Test Sysplex has:
MEDIA1=0111,
MEDIA2=0112,
ERROR=011E,
PRIVATE=011F,
Does this answer your question?
Kees.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
Behalf Of R.S.
Sent: 14 March, 2019 18:37
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Software volume category
I mean SMS-managed tapes, and possible entries in DEVSUPxx member, for
example default
MEDIA11 =000B
(this is default for JC media, also called EATC)
Question: where the category is recorded?
AFAIR it is recorde in the ATL, that means Library Manager (PC inside
the library).
However is it recorded anywhere on z/OS side?
Neither VOLCAT, nor RMM show this value.
Q2: Is there any difference between ISMF.2. (Volume - Mountable tape)
information and output from IDCAMS LISTCAT VOLENTRY(Vvolser) ?
Of course I don't mean visual aspects, rather source of information.
LISTCAT takes info from VOLCAT, what about ISMF panels? Is there any
complementary information, i.e. recorded in SMS CDS?
Q3: What is the purpose of volume categories? Is it specific for just
z/OS (mainframe systems) or it is something widely used by ATLs?
Is there any table describing default categories including media JD and
JE or it does not make any sense, because this media is not supported in
z/OS?
(note: JE media is for TS1160 which is not supported in z/OS neither
directly, nor as VTS backend)
--
Radoslaw Skorupka
Lodz, Poland
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