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  3. July 2004

RE: Disk Replacement

The answer is Yes. One caveat - in order for the system to arrange logicals so that they can be shared, it is necessary to save both the logicals and their parent physical. If you save only the logical files, the order does not get rearranged for sharing. I just tried this last week. You do not need to restore the physical for the logicals to get rearranged, just save it.

Vern

At 01:15 PM 7/13/2004, you wrote: 
Pro's/con's of unload/reload versus replacing a series of drives online.

Pro's of unload/reload
1)  When you restore it will make intelligent decisions as to the order to
restore logical files.  This will help it to reuse access paths if you
previously created logical files in the wrong order.
2)  Should balance your disks better, thus increasing performance.

Pro's of replacing a series of drives online:
1)  No downtime.

Point of information:  The odds of missing something during an
unload/reload are a lot smaller if your read the B&R V5R3 manual
carefully.  Then even suggest running the
RSTLIB SAVLIB(*ALLUSR) DEV(TAPxx) MBROPT(*NEW) ALWOBJDIF(*ALL)
to get those logical files, etc that might be in different libraries.

Question:  If I save access paths (which dramatically reduces the restore
time) does the system still try to recreate logical files in the order
that best allows the reuse of access paths?

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com



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