Date: Fri, 13 Jun 2008 16:15:06 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: David Kelly <dkelly@hiwaay.net> Cc: FreeBSD Questions <questions@freebsd.org>, freebsd-questions@freebsd.org Subject: Re: Stripe sizes with gstripe Message-ID: <20080613161329.U1540@wojtek.tensor.gdynia.pl> In-Reply-To: <20080613140130.GA8616@Grumpy.DynDNS.org> References: <200806121521.16237.kirk@strauser.com> <F67BB207-BA27-4772-A90C-5CB3279F0172@hiwaay.net> <20080613090714.K4713@wojtek.tensor.gdynia.pl> <20080613140130.GA8616@Grumpy.DynDNS.org>
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>> then single read is rarely split on 2 disks, while multiple reads have >> good chances to touch different drives > > Come to think of it I didn't try setting the stripe size larger than the > ATA max transaction size of 128k. yes it is. max transaction doesn't begin on boundary. may (usually will) start somewhere inbetween. making stripe size >>max transaction makes it inprobable. BTW you mean ATA max transaction or FreeBSD default MAXBSIZE, which i change to 1MB
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