From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Tue Jul 30 2002 - 05:06:33 EDT
I usually have a separate dump device, so it can survive a reboot and I
don't have to mess around saving a dump to tape. One could get away with
not mirroring that.
But if you lose a disk with an unmirrored paging space on it your system
will crash. Maybe not immediately, but it _will_ happen. Since that's what
you're tying to avoid by mirroring rootvg it makes no sense to exclude any
paging space.
It's also worth mentioning that if you feel the need to mirror rootvg, then
you really ought to mirror any paging spaces in external volume groups, even
if you feel you don't need to mirror the application data.
Simon Green
Philip Morris ITSC Europe
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 seldom be appreciated.
> -----Original Message-----
> From: Drew [mailto:apt@dcs-success.com]
> Sent: 29 July 2002 20:39
> To: aix-l@Princeton.EDU
> Subject: Re: Mirroring rootvg with the mirrorvg command
>
>
> I thought it was better not to mirror the default dump device
> which resides
> (by default) in hd6. At least as far as AIX 4.3.3 is concerned. If the
> default dump device is not on hd6, then it shouldn't matter.
> I personally do
> not mirror the paging space because there is no reason to
> have another disk
> spinning for a mirrored paging space. Why mirror it when you
> are just taking
> up extra resources and adding wear and tear to a disk?
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