From owner-freebsd-stable Sun May 6 14:43:52 2001 Delivered-To: freebsd-stable@freebsd.org Received: from nero.transactionsite.com (nero.transactionsite.com [203.14.245.6]) by hub.freebsd.org (Postfix) with SMTP id 3154A37B422 for ; Sun, 6 May 2001 14:43:48 -0700 (PDT) (envelope-from janm@transactionware.com) Received: (qmail 57363 invoked from network); 6 May 2001 21:38:35 -0000 Received: from unknown (HELO haym) (192.168.1.9) by 192.168.1.6 with SMTP; 6 May 2001 21:38:35 -0000 Message-ID: <003c01c0d675$2b269380$0901a8c0@haym.transactionsite.com> From: "Jan Mikkelsen" To: "Charlie Watts" Cc: "freebsd-stable" Subject: Re: soft update should be default Date: Mon, 7 May 2001 07:40:27 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3612.1700 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3612.1700 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Charlie Watts 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