From owner-freebsd-current Fri Dec 17 5:25:48 1999 Delivered-To: freebsd-current@freebsd.org Received: from test.tar.com (test.tar.com [204.95.187.4]) by hub.freebsd.org (Postfix) with ESMTP id C010C14BDE for ; Fri, 17 Dec 1999 05:25:43 -0800 (PST) (envelope-from dick@test.tar.com) Received: (from dick@localhost) by test.tar.com (8.9.3/8.9.3) id HAA04225; Fri, 17 Dec 1999 07:25:24 -0600 (CST) (envelope-from dick) Date: Fri, 17 Dec 1999 07:25:24 -0600 From: "Richard Seaman, Jr." To: Soren Schmidt Cc: "Richard Seaman, Jr." , djb@Wit389306.student.utwente.nl, freebsd-current@FreeBSD.ORG Subject: Re: ATA driver problem?? (lost disk contact) Message-ID: <19991217072524.B320@tar.com> References: <19991216165055.A320@tar.com> <199912170722.IAA04753@freebsd.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: <199912170722.IAA04753@freebsd.dk>; from sos@freebsd.dk on Fri, Dec 17, 1999 at 08:22:03AM +0100 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Dec 17, 1999 at 08:22:03AM +0100, Soren Schmidt wrote: > Yup, sounds like the problem some are seing, now I wonder why I > havn't seen it on any of the IBM disks I've access to, hmm... > > It apparantly can't be disabled, but I'll try to figure out if > I can detect when the drive is in this mode, or put it in > standby mode and back again when there is nothing else to do, > that should reset the timer... Note that the wd driver doesn't "report" any problems. Don't know if that is because the wd driver handles this differently, or because the reporting is different. The machine that reports these problems runs 7/24, and has for over a year and a half. The IBM disk has been in for quite a while (maybe 6 months or more). Only ata "reports" the problem. Note that the IBM specs say that spinup from standby to idle is 13 secs "typical" and 31 secs max for this drive. I'm assuming that what we're seeing is that the ata driver "lost contact" because the timeout is less that the time it takes to spinup from standby to idle (or to spinup from an interrupted switch from idle to standby)? -- Richard Seaman, Jr. email: dick@tar.com 5182 N. Maple Lane phone: 262-367-5450 Chenequa WI 53058 fax: 262-367-5852 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message