From owner-freebsd-scsi Wed Feb 18 15:14:24 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA07592 for freebsd-scsi-outgoing; Wed, 18 Feb 1998 15:14:24 -0800 (PST) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from misery.sdf.com (misery.sdf.com [204.244.213.32]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id PAA07584 for ; Wed, 18 Feb 1998 15:14:12 -0800 (PST) (envelope-from tom@sdf.com) Received: from tom by misery.sdf.com with smtp (Exim 1.73 #1) id 0y5HsJ-0005GW-00; Wed, 18 Feb 1998 14:21:55 -0800 Date: Wed, 18 Feb 1998 14:21:54 -0800 (PST) From: Tom To: "Justin T. Gibbs" cc: Wee Teck Ng , freebsd-scsi@FreeBSD.ORG Subject: Re: very slow scsi performance In-Reply-To: <199802182146.OAA25726@pluto.plutotech.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, 18 Feb 1998, Justin T. Gibbs wrote: > >> Without a doubt, IBM. > > > > I have some doubts about that. Seagate Barracuda work really well > >too. 20 drives in 24x7 so far, and no failures. > > Many recent Seagate drives are okay, but when I have the choice, I pick > IBM over Seagate. This has as much to do with reliability as with how > well behaved SCSI protocol wise, the IBM drives are. Their firmware is > rock solid and their reliability numbers leave Seagate in the dust. Didn't the IBM DCAS or DORS drive have some firmware bugs in regards to tags? Are you referrring to the newer IBM Ultrastar line? In fact, I just found a message from a DCAS sent to a freebsd list today, that has to disable disconnection to get reliable operation with his 2940 and his DCAS drive. I can't verify that, but I have few problems with 11 Seagate drives hung off a 3940UW. The ahc driver freezes up the system every 6 weeks of heavy 24x7 i/o though. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message