Date: Thu, 30 Apr 1998 12:10:57 -0500 From: Raul Zighelboim <rzig@verio.net> To: "'Tom'" <tom@sdf.com> Cc: "'scsi@freebsd.org'" <scsi@FreeBSD.ORG>, "'n@nectar.com'" <n@nectar.com> Subject: RE: DPT driver performance Message-ID: <A03CD00C69B1D01195AB00A024ECEB1684CB26@kaori.communique.net>
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I am running ONE drive on an AHC controller and ONE drive on a DPT controller. No stripping, no raid. Just one drive. Both are formated with 512b/s. No, I do not intend to run iozone as my main application. But it bothers me that under the same conditions, the Adaptec controller can write a large file twice as fast. You're saying that this is not relevant ? ================================================== Raul Zighelboim rzig@verio.net > -----Original Message----- > From: Tom [SMTP:tom@sdf.com] > Sent: Thursday, April 30, 1998 10:27 AM > To: Raul Zighelboim > Cc: 'scsi@freebsd.org'; 'n@nectar.com' > Subject: Re: DPT driver performance > > > On Thu, 30 Apr 1998, Raul Zighelboim wrote: > > > Is there anything I can do to improve the DPT performance? Can I > > Is your DPT performance actually poor? You've shown that iozone > looks > bad, which could be a problem if your server is intended to run iozone > all > the time. > > The array settings are much more important. Things like strip size, > number of drives and the RAID level used are critical. Strangely you > did > not even mention any of this stuff. > > Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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