There has been some enhancements to the FLASHCOPY portion of z/VM since
0801. I'd upgrade it to the latest (which is a relatively simple task)
and see if that improves your situation.
Frank M. Ramaekers Jr.
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Boukhemis, Waheb
Sent: Monday, October 11, 2010 2:48 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: z/Linux Read Only Disk
We are currently running z/VM 5.4 at 801 CPLEVEL. We have 12 Linux
servers running Red Hat. Once a week, we use DFDSS on the z/OS side
(z/OS 1.9) to flash copy all the z/VM disks and then copy the flash
copied volumes to tape. This process had been working fine for 18
months. We never put any maintenance on z/VM side, but a lot of
maintenance had been applied to the z/Linux Servers. About a month ago,
we started getting a read only disk error on the z/Linux disk whenever
we ran the flash copy. We then wrote scripts to shutdown all the z/Linux
servers before doing the flash copy, which only takes about 17 seconds,
but the problem still persists.
Does anybody have any idea?
Thanks,
_
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