Date: Sat, 20 Feb 1999 09:26:35 +0100 From: sthaug@nethelp.no To: roberto@keltia.freenix.fr Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: slow disk performance Message-ID: <11246.919499195@verdi.nethelp.no> In-Reply-To: Your message of "Fri, 19 Feb 1999 20:15:46 %2B0100" References: <19990219201546.A18865@keltia.freenix.fr>
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> According to sthaug@nethelp.no: > > I get around 7.5 MB/s reading from the raw device on my DCAS-34330W, using > > an NCR875 based controller (Tekram). Somewhat less when writing. > > I'm surprised. When I got my first DCAS-34330W, also on a NCR-875 card, I > got a bit more than 8 MB/s... I get 13 MB/s on the Viking II/AHA-7880UW on > my second machine. > > DCAS-34330W (5400 rpm): > 262144000 bytes transferred in 32.113711 secs (8162993 bytes/sec) Our times are definitely comparable. I was using M=1048576, and being a bit conservative :-) Here are two runs from today: 268435456 bytes transferred in 32.948539 secs (8147113 bytes/sec) 268435456 bytes transferred in 33.194596 secs (8086722 bytes/sec) Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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