From: Hunter, Mark (Mark.Hunter@ANHEUSER-BUSCH.COM)
Date: Wed Jul 23 2003 - 17:09:06 EDT
Well, almost.
You can not replace and remirror rootvg. The list of bootable drives is
configured at boot time and can not be changed without a reboot. The new disk
will not be listed until a reboot. You can replace any non rootvg on the fly
and be ok.
Mark Hunter
-----Original Message-----
From: Rick Saylor [mailto:rsaylor@AUSTINCC.EDU]
Sent: Wednesday, July 23, 2003 3:58 PM
To: aix-l@Princeton.EDU
Subject: Re: [Q] rootvg mirror question?
It is not that simple. Remember that AIX will remember the PVID of the
disks. So, AIX is probably going to see the drive as hdisk1 even though you
put in hdisk0's slot.
However, I think you are missing the point of the mirrorv rootvg command.
Once mirrored, AIX keeps both drives in sync. So, in the event of a disk
failure the other drive will keep the system up, regardless of whether
hdisk0 or hdisk1 failed. If you put both hdisk0 and hdisk1 in the bootlist
you will even be able to boot off of the good drive, again regardless of
which drive failed. And if the disks are hot swapable you'll be able to
replace and re-mirror the bad drive while the system is still up!
Rick Saylor
Austin Community College
At 03:52 PM 7/23/2003 -0400, you wrote:
>We have AIX 4.3.3 on IBM RS/6000 server. I know I can use "mirrorvg
>rootvg" to mirror hdisk0 and hdisk1. My question is on SUN SOlaris I can
>use "DD" to copy partitions on hdisk0 to hdisk1. In case Hdisk0 bad, I
>just swap hdisk0 and hdisk1 and reboot.
>
>Can I do the same thing on AIX? If Yes, how to do it? If NOT, why?
>
>Thanks.
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