Date: Wed, 11 Nov 1998 19:42:13 +1030 From: Greg Lehey <grog@lemis.com> To: =?iso-8859-1?Q?S=F8ren_Schmidt?= <sos@freebsd.dk>, john cooper <john@isi.co.jp> Cc: hackers@FreeBSD.ORG, mike@smith.net.au, ticso@cicely.de Subject: Re: SCSI vs. DMA33.. Message-ID: <19981111194213.H20849@freebie.lemis.com> In-Reply-To: =?iso-8859-1?Q?=3C199811110816=2EJAA01536=40freebsd=2Edk=3E=3B_from_S=F8?= =?iso-8859-1?Q?ren_Schmidt_on_Wed=2C_Nov_11=2C_1998_at_09:16:01AM_%2B0100?= References: <98Nov11.134648jst.21907@ns.isi.co.jp> <199811110816.JAA01536@freebsd.dk>
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On Wednesday, 11 November 1998 at 9:16:01 +0100, Søren Schmidt wrote: > It seems john cooper wrote: >> >> Hi, >> Just wondering if anyone has any _objective_ opinion on >> the performance of say wide SCSI2 vs. DMA33 IDE drives [running >> on contemporary motherboards]. The theoretical throughputs of >> 40MBs and 33MBs don't tell me a whole lot. I know SCSI was the >> choice for performance in the past, however I'm curious what >> others are seeing in actual usage these days. > > Well, at my ISP we run 4 NFS servers that handels all mail/web/misc > stuff for the users, needless to say they are "used" alot. Those 4 > machines are P233/64M PC's with 4*4.3G UDMA IDE drives in them, > configured in pairs as mirrors with ccd. They perform wonderfully. > And the price cannot be beaten too :) > > I must say that the newer UDMA IDE drives has come a long way > lately, they perform at least as good as their SCSI counterparts. > The only thing that they cannot do is overlapping commands, but > given EIDE's much smaller cmd overhead, I'm not sure this has > any significance at all in practice. This last point would appear to be borne out in my measurements earlier today. Greg -- See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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