Date: Mon, 19 Jun 2006 11:57:15 -0400 From: Charles Swiger <cswiger@mac.com> To: Ensel Sharon <user@dhp.com> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Please help - adaptec 2820sa not ... RESOLVED Message-ID: <E2981A23-020B-448B-9578-5830690757F1@mac.com> In-Reply-To: <Pine.LNX.4.21.0606182241540.12027-100000@shell.dhp.com> References: <Pine.LNX.4.21.0606182241540.12027-100000@shell.dhp.com>
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On Jun 18, 2006, at 10:44 PM, Ensel Sharon wrote: > Let's say I have 8 disks. > > Let's say I require raid6. You require RAID-6 because...? If you want more fault tolerance or better performance, RAID-10 makes a lot more sense to me than RAID-6, but YMMV. > If I make one array, I lose 25% to raid overhead. > > If I make two arrays, I lose 50% to raid overhead. Using RAID-6 with 4 disks does not make much sense, no. (Using RAID-10 with 4 disks works great, however. Yes, the overhead is greater, but the write performance is much better, and it would seem like RAID-10 would result in you having a configuration that fits into 2TB LUN limitation....) -- -Chuck
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