Date: Tue, 28 Mar 2000 16:10:42 +0930 From: Greg Lehey <grog@lemis.com> To: Jon Rust <jpr@vcnet.com> Cc: nino@inode.at, freebsd-questions@FreeBSD.ORG Subject: Re: vinum and disk failures - practical experience? (+ more IDE RAID questions) Message-ID: <20000328161042.C16612@freebie.lemis.com> In-Reply-To: <p04310173b502fbde065a@[209.239.239.22]> References: <20000325182955.P15889@TK147108.telekabel.at> <p04310173b502fbde065a@[209.239.239.22]>
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On Saturday, 25 March 2000 at 15:42:53 -0800, Jon Rust wrote: > At 6:29 PM +0100 3/25/00, Marinos J . Yannikos wrote: >> Does anyone have practical experience with recent versions of vinum and >> actual disk failures, particularly with a RAID 0+1 configuration (or perhaps >> RAID 1 only) and IDE disks? > > I've been through the restore. See my post yesterday regarding steps > to take. My config when I did it was a 1+0 setup, but with SCSI. I > can't imagine the process being any different for IDE. > > > http://x41.deja.com/[ST_rn=ps]/threadmsg_if.xp?thitnum=131&mhitnum=0&CONTEXT=954027657.1712455691 > >> I'm trying to figure out which configurations would give the best data >> resilience with 2-4 IDE disks and vinum's reaction to my first attempts >> at simulating disk failures weren't particularly encouraging. > > Resilience: mirror. Resilience plus performance: 1+0 (if you have at > least 3 drives, preferably more) Remember that striping only wins if you can overlap the transfers to the disks. You can't do that with two disks on a single IDE controller: it performs the transfers one after another. If you want performance on IDE drives, use one controller per drive. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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