Elardus,
> Do you have PPRC from/to your DR site?
No PRCC on the 8300 box.
> I am confused by your two [conflicting?] statements,
These are real 3590's attached via 2g ficon via (what I understand is) a
J70 controller. The 'real z/os sysprog' (I normally manage the z/VM
stuff) asked me to watch the drives to make sure they were not rewinding
and repositioning between each job step as the job used a different job
step for each 3390 volume restore. I saw no indication of rewinding
between steps.
Tony Thigpen
Elardus Engelbrecht wrote on 09/25/2015 06:55 AM:
John Eells wrote:
I asked Development about this, causing some head-scratching. They'd like you
to open a PMR so they can dig into why this could be happening.
Possibly hardware error - a PMR is an excellent suggestion.
If there is a PMR, ask them to check EACH tape/cartridge individual response
times and from WHAT unit of each drive. (Same question Tim Hare also asked
earlier)
To Tony:
Please repeat the whole restore with another set of backup+restore volsers [
and perhaps to other tape UNITS ] to see if timings are the same or not.
Just a guess, but are your volsers already pre-INIT or not or are they 'true'
VTS (i.e., not really physical storage media)?
I am confused by your two [conflicting?] statements, this is why I ask above
question:
"We are talking real physical 3590 tape drives. (2g ficon)"
and
"Tapes are not rewinding and repositioning between backup files."
Do you have PPRC from/to your DR site? (Yes, I know you said "Same physical CPU,
same Disk, same tape drives.", but PPRC may or may not be affecting your writing
timings.)
Are you getting channel errors? [1]
Groete / Greetings
Elardus Engelbrecht
[1] - That channel errors bit me and others hard causing slow usage of
tape/cartridge. That was until many parts were physically replaced.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
