Mirroring Vinum Volumes - importance of subdisk sequence on mirrordevice

[Richard Johannesson]

It seems dumpconfig provides absolute settings of the subdisks. Might as
well use those offsets just in case it matters.

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org [mailto:owner-freebsd-
> questions at freebsd.org] On Behalf Of Richard Johannesson
> Sent: Wednesday, July 30, 2003 1:52 PM
> To: freebsd-questions at freebsd.org
> Subject: Mirroring Vinum Volumes - importance of subdisk sequence on
> mirrordevice
> 
> Question:
> Is it important that the sequence plexes/sub-disks get created in for the
> primary drive and the mirrored drive be the same? Any performance penalty?
> 
> I'm guessing that a different sub-disk creation order will put the sub-
> disks
> in different places on a disk.
> 
> Background - if needed:
> Have 10 vinum volumes being mapped by 10 plexes to the root drive.
> 
> To get mirroring, I created plexes/sub-disks for swap, root, and usr using
> the specific offsets for each on the 2nd hdd device and map them back to
> their specific volumes they should be mirroring.
> 
> When I start creating the other plexes/sub-disks on the 2nd hdd and map
> them
> back to the volume already setup, I won't be using specific offsets.
> 
> 
> Thanks,
> Richard
> 
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