From owner-freebsd-scsi Sun May 21 13:36:37 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from front1m.grolier.fr (front1m.grolier.fr [195.36.216.51]) by hub.freebsd.org (Postfix) with ESMTP id 3031F37B991 for ; Sun, 21 May 2000 13:36:16 -0700 (PDT) (envelope-from groudier@club-internet.fr) Received: from ppp-163-110.villette.club-internet.fr (ppp-163-110.villette.club-internet.fr [195.36.163.110]) by front1m.grolier.fr (8.9.3/No_Relay+No_Spam_MGC990224) with ESMTP id WAA12901; Sun, 21 May 2000 22:35:58 +0200 (MET DST) Date: Sun, 21 May 2000 22:11:54 +0200 (CEST) From: =?ISO-8859-1?Q?G=E9rard_Roudier?= X-Sender: groudier@linux.local To: David Kelly Cc: Kenneth W Cochran , freebsd-scsi@FreeBSD.ORG Subject: Re: SCSI 2x-4x slower than IDE? In-Reply-To: <200005211721.MAA66868@nospam.hiwaay.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Sun, 21 May 2000, David Kelly wrote: > Kenneth W Cochran writes: > > Hello -scsi, > >=20 > > (Yes, the old SCSI vs IDE flamewar, but I'd like to avoid that, > > thank you... :) > [...] > > 1. What's going on "here" in M$/Win9x? >=20 > I think your Win9x friend should look into the caching mode page=20 > settings on his new IBM drive. New IBM drives that I've seen have=20 > shipped with caching disabled. Its not fair to compare unless the=20 > caching is the same on all. Given the differences in elapsed time that has been reported: 4 min for old IDE 8 min for old SCSI > 15min for new SCSI I am not sure that write behind caching by the drive is the issue. Btw, an O/S is also supposed to cache disk data and sort requests. =20 > > 2. What does this imply (or not imply) for FreeBSD? >=20 > It means to accurately apply it to FreeBSD you have to try it. And I bet that either differences would be just reversed, or issue,=20 if any, would be quickly fixed. G=E9rard. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message