Date: Wed, 27 Oct 2004 08:57:40 -0600 From: secmgr <security@jim-liesl.org> Cc: miha@ghuug.org Subject: Re: question on vinum Message-ID: <417FB764.2040109@jim-liesl.org> In-Reply-To: <417F8EF6.9060304@mac.com> References: <200410270027.47092.miha@ghuug.org> <1098855222.15580.81.camel@emperor> <200410271114.36794.miha@ghuug.org> <417F8EF6.9060304@mac.com>
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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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