From owner-freebsd-scsi Fri May 29 03:32:13 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id DAA18713 for freebsd-scsi-outgoing; Fri, 29 May 1998 03:32:13 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from ns1.yes.no (ns1.yes.no [195.119.24.10]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id DAA18656; Fri, 29 May 1998 03:32:07 -0700 (PDT) (envelope-from eivind@bitbox.follo.net) Received: from bitbox.follo.net (bitbox.follo.net [195.204.143.218]) by ns1.yes.no (8.8.7/8.8.7) with ESMTP id KAA09421; Fri, 29 May 1998 10:32:03 GMT Received: (from eivind@localhost) by bitbox.follo.net (8.8.8/8.8.6) id MAA25905; Fri, 29 May 1998 12:31:49 +0200 (MET DST) Message-ID: <19980529123029.12289@follo.net> Date: Fri, 29 May 1998 12:30:29 +0200 From: Eivind Eklund To: tcobb , "'freebsd-current@freebsd.org'" , "'freebsd-scsi@freebsd.org'" Subject: Re: DPT driver fails and panics with Degraded Array References: <509A2986E5C5D111B7DD0060082F32A402FAD1@freya.circle.net> <19980529122551.16212@follo.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.89.1i In-Reply-To: <19980529122551.16212@follo.net>; from Eivind Eklund on Fri, May 29, 1998 at 12:25:51PM +0200 Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Fri, May 29, 1998 at 12:25:51PM +0200, Eivind Eklund wrote: > Hypothesis 1: The problem occur when using your type of controller, > RAID5+HotSpare, "large" amounts of capacity used, your kernel, and > a disk fail. > Verification: Create above setup, try to fail a disk on it. > > Now, which parameters to vary depend on whether we can get the above > to crash. It might be dependent on having exactly equal disks, too > :-( This was a pretty dumb way of saying this. What I meant was that forming further hypotheses/verifiction pairs in any effective manner seems pretty difficult without knowing the results of the above test. If you have more data, or more hypotheses/verification pairs, then come with 'em. If you want to be 100% certain of coming to a conclusion, this is usually the way to do it (but it can be expensive in terms of the number of tests you have to do). Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message