Date: Sun, 26 Oct 2003 16:42:36 -0800 From: "Rishi Chopra" <rchopra@cal.berkeley.edu> To: <questions@freebsd.org> Subject: Choosing A Stripe-Size (RAID5 Array) Message-ID: <MDENIIAHFGAKAOJHCEGLIEBMCGAA.rchopra@cal.berkeley.edu>
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I've had a tough time getting help for this question on the newsgroups and freebsd.org discussion forums, so I thought I'd mail the list... I'm setting up a 600GB Raid-5 array (4-200GB 8MB Buffer IDE disks connected to an Adaptec 2400A controller) and would like some help picking a stripe-size (this is the smallest unit of data written to each disk by the raid controller.) My usage pattern is fileserver and webserver+db, some light desktop usage as well. I'll be using defaults for the file system (16K block size.) Based on experience, can anyone suggest a good stripe-size choice? Also, if this controller performs best with a particular stripe-size under FreeBSD (due to driver design, etc.) please say so; I can always tweak the newfs command line switches to accomodate a particular stripe-size choice. Please CC me on any response, as I am not a regular list subscriber. -Rishi rchopra@cal.berkeley.edu
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