Hi,
Does anyone know if the output from a D SMS,VOL(xxxxxx) command in CBR1180I
is NOT supposed to accurately reflect the status of a volume in the IBM VTS
cache?
I was trying to determine this (from MVS) and some volumes do display the
additional status line "Volume is cache resident". I have taken volumes not
accessed in days and so out of cache run a GENER using a data set on them as
input to DUMMY reading the data set. I run this job the first time and it
is delayed as expected while the volume is retrieved to cache subsequent
runs are immediate as expected. Nothing changes in the output from D
SMS????
Here is a recently created volume and it does show this.
D SMS,VOL(384990)
F OAM,D,VOL,384990,L=BSYS0020-Z
F OAM,D,VOL,384990,L=BSYS0020-Z
CBR1180I OAM tape volume status: 949
VOLUME MEDIA STORAGE LIBRARY USE W C SOFTWARE LIBRARY
TYPE GROUP NAME ATR P P ERR STAT CATEGORY
384990 MEDIA2 SGVTS LIBVTS01 P N N NOERROR PRIVATE
-------------------------------------------------------------------
RECORDING TECH: 36 TRACK COMPACTION: YES
SPECIAL ATTRIBUTE: NONE ENTER/EJECT DATE: 2002-03-01
CREATION DATE: 2002-03-01 EXPIRATION DATE: 1999-00-00
LAST MOUNTED DATE: 2005-06-03 LAST WRITTEN DATE: 2005-06-03
SHELF LOCATION:
OWNER:
-------------------------------------------------------------------
Logical volume.
Volume is cache resident.
I cannot find much about this and the documentation on CBR1180I just lists
"Volume is cache resident" as one of the possible "status lines Additional
tape volume status messages as follows:". My VTS volumes all show "Logical
volume" but it looks like "Volume is cache resident" is only displayed for
recently CREATED volumes. So even if I have read a volume recently and can
again without going out to back end tape it does not show "Volume is cache
resident".
Anyone spent time in this cave and grok (nee understand) if this is Working
As Designed (WAD) or just Working As Coded (WAC)?
Thanks,
Sam Knutson, GEICO
Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
"Think big, act bold, start simple, grow fast..."
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