Re: Antwort: Re: Urgent!! rootvg over 2 disks? [Virus checked]

From: Holger.VanKoll@SWISSCOM.COM
Date: Thu Mar 04 2004 - 13:40:45 EST


hd5 has to reside at the "beginning" of the disk. i dont know the limit
anymore; but its mentioned in some migration-readme or migration-guide

check with lslv -m hd5 where it resides

btw. i always break mirrors before migration - prevents some problems
from apperaring and costs nothing
furthermore i always use alt_disk_install to have a fast fallback -
another reason to break mirroring

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
fmu@OERAG.DE
Sent: Thursday, March 04, 2004 7:30 PM
To: aix-l@Princeton.EDU
Subject: Antwort: Re: Urgent!! rootvg over 2 disks? [Virus checked]

Thanks.
But I have the problem that the node don't boot after I extend the
rootvg
over 2 disks.

The problem is this:

I migrate a SP node from AIX 4.3.3 to AIX 5.2. The first migration
fails,
because hd5 was only 8 MB and the procedure can't extend hd5 because
hdisk0
was full. So I reboot the node normal and extend the rootvg with the
second
disk and mirror to hdisk2 and hdisk3. Then I extend hd5, it is located
complet on hdisk0, start an bosboot -ad /dev/hdisk0.
Now I restart the migration and it runs. But after the migration the
node
reboots automatically (this is o.k.), but it stops by starting the
AIX.....
I start the node in maintenance mode and check rootvg, but it shows o.k.
I
controll with lslpp the software and it is on AIX 5.2 and PSSP 3.5

that's my problem

                      "Green, Simon"
                      <Simon.Green@EU.A An:
aix-l@Princeton.EDU
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rootvg over 2 disks? [Virus checked]
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                      04.03.2004 19:20
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I don't think there's any particular limit to how many disks rootvg is
on.
Four is certainly OK.

In general, it is advisable to keep application data out of rootvg: it
makes
life simpler in the long run. You might want to see if you could create
a
new VG instead and move some stuff into that.

--
Simon Green
Altria ITSC Europe Ltd
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> -----Original Message-----
> From: fmu@OERAG.DE [mailto:fmu@OERAG.DE]
> Sent: 04 March 2004 18:06
> To: aix-l@Princeton.EDU
> Subject: Urgent!! rootvg over 2 disks? [Virus checked]
>
>
> Hi,
> ist it possible to expand the rootvg over 2 disks?
> The reason is, that my rootvg is full (hdisk0) and i extend it with a
> second disk. Now I want to have
> hdisk0 + hdisk1         for orig. data
> hdisk2 + hdisk3         for mirror
>
 > Ist this possible or must the rootvg locate on one disk?


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