Re: question on vinum
From: secmgr (security_at_jim-liesl.org)
Date: 10/27/04
- Previous message: Kris Kennaway: "Re: /dev is full...help"
- In reply to: Chuck Swiger: "Re: question on vinum"
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Date: Wed, 27 Oct 2004 08:57:40 -0600
Chuck Swiger wrote:
> No. All of the drives need to be the same size. With RAID-5, which
> drive is used to hold parity data rotates on a stripe-by-stripe basis
> to balance out the load.
Just to clarify this point. All the subdisks in the plex need to be the
same size. The physical drives and even the bsd partitions/vinum drives
do not actually have to be the same.
An example would be you have 2x 40gig partitions, and 2x 60 gig
partitions. You could make a stripe set using 4 40gig (160gig) subdisks
(or a 120gig raid 5 set). You just would't use the remaining 20 gig on
the other two drives. You could use the space, just not for this plex.
(you could create a 40gig (20+20) stripe or concat set or a mirrored
20gig area) Concat, on the other hand doesn't care and would happily use
40+40+60+60 (just not with the same perf levels)
jim
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- Previous message: Kris Kennaway: "Re: /dev is full...help"
- In reply to: Chuck Swiger: "Re: question on vinum"
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