From: Coyle, Jack (Jack.Coyle@REXHEALTH.COM)
Date: Tue Mar 09 2004 - 12:07:21 EST
Two issues as I see it. First, using the unmirrorvg may be much more command
than you want or bargained for if oravg has "umpteen" logical volumes. I'd
be more inclined to use the output from an "lsvg -l hdisk17" and then use
"rmlvcopy <LVname> 1 hdisk17" (assumes, of course that there is only one
mirror) to free up the disk. BTW, this will get "exciting" if the logical
volumes on that disk are also on other disks as well. In this case, you will
need to include those disks with hdisk17 in the rmlvcopy command. Second,
your reducevg and rmdev (of hdisk17) would remain, but before you do the
rmdev, you should issue an "ssaxlate -l hdisk17" to determine the pdisk
associated with that hdisk and then do an rmdev on that as well (rmdev -dl
pdisk??". After replacing the disk, remember to run cfgmgr to allow the new
disk to be picked up and configured. Then execute your extendvg, followed by
a number of "mklvcopy -k <LVname> 2 hdisk17" (corresponding to teh number of
rmlvcopy commands needed previously). Again, it gets "exciting" if the
logical volumes span disks and you wish to replicate the mapping that was in
place before. In this case you will need to create a mapping of the original
copy of any such logical volume and use that to generate a map as to how you
want the mirror to look. You would then use the "-m <map_file>" option on
mklvcopy. All in all, a piece of cake. HTH.
Regards
Jack Coyle
Rex Healthcare
(919) 784-3792
jack.coyle@rexhealth.com
-----Original Message-----
From: Tim Muller [mailto:aix_sa_706@YAHOO.COM]
Sent: Tuesday, March 09, 2004 11:22 AM
To: aix-l@Princeton.EDU
Subject: Replacing Failing SSA Disk
I am getting an SSA_DISK_ERR4 error on my J40 running
AIX 4.3.3. The disk is in a mirrored VG. I have
never replaced a disk on a running system before, so
I'd feel better if someone would look over the
procedure I'm planning to follow and let me know if I
am overlooking anything. Thanks very much.
unmirrorvg oravg hdisk17
reducevg oravg hdisk17
rmdev -l hdisk17 -d
[replace disk drive, let the drive be renamed hdisk17]
extendvg oravg hdisk17
mirrorvg oravg
=====
Tim Muller
Hamilton Co. Dept. of Job & Family Services
Cincinnati, OH USA
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