Re: SSA Loop Verification Question (graphics)
From: Bill Verzal (BVerzal_at_KOMATSUNA.COM)
Date: 04/25/03
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Date: Fri, 25 Apr 2003 10:25:35 -0500 To: aix-l@Princeton.EDU
These VG's don't varyon automatically. I'm not sure I have enough cables
for your config. I'll check. I've been told that there is somewhat of a
budget to fix this, but I'd rather not spend if I don't have to, if you
know what I mean.
Thanks, Bill.
___________________________________________
Bill Verzal
AIX Admin/Komatsu America
(847) 970-3726 (v)
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Another thought: I would advise against having VGs vary on automatically at
startup, because you can't guarantee that all disks will be available at
that time. Consider the case where you're doing power maintenance, and all
machines are shut down. The sequence in which the machines are started and
their specific hardware configurations will determine at what point the
loops are intact. Any maintenance where you have two or more nodes down at
once could produce problems.
Simon Green
Altria ITSC Europe s.a.r.l.
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will not be appreciated.
> -----Original Message-----
> From: Bill Verzal
> Sent: 25 April 2003 15:57
> To: aix-l@Princeton.EDU
> Subject: Re: SSA Loop Verification Question (graphics)
>
>
> Thanks for your thoughts.
>
> Indeed, all 5 nodes would need access to all disks at one
> time or another,
> so it needs to stay in that mode. In terms of outages, this is just a
> backup pool, so if there are hosts down, it is of no concern,
> unless if
> course backups are running. We've never had an instance
> where there were 2
> nodes down, but it could happen of course.
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