Date: Mon, 7 May 2001 07:40:27 +1000 From: "Jan Mikkelsen" <janm@transactionware.com> To: "Charlie Watts" <cewatts@frontier.net> Cc: "freebsd-stable" <freebsd-stable@FreeBSD.ORG> Subject: Re: soft update should be default Message-ID: <003c01c0d675$2b269380$0901a8c0@haym.transactionsite.com>
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Charlie Watts <cewatts@frontier.net> wrote: >On Sun, 6 May 2001, Jan Mikkelsen wrote: >> Good write speed is possible without using write cache by using tagged >> command queueing. Have you measured tagged command queueing vs. write cache >> for write speed on your SCSI drives? I get about the same (~23MB/sec) on an >> IBM DLTA-307030 Ultra ATA drive (tags/no WC vs. no tags/WC). With neither >> option, it is terrible, of course. > >I see the same behaviour on one of those disks, too. But - aren't IBM's >DTLA-series disks the only IDE drives that support TCQ? No, there's also another IBM series. :-) (Deskstar 60GXP; I can't remember the model numbers). Jan Mikkelsen To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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