Date: Fri, 29 May 1998 12:30:29 +0200 From: Eivind Eklund <eivind@yes.no> To: tcobb <tcobb@staff.circle.net>, "'freebsd-current@freebsd.org'" <freebsd-current@FreeBSD.ORG>, "'freebsd-scsi@freebsd.org'" <freebsd-scsi@FreeBSD.ORG> Subject: Re: DPT driver fails and panics with Degraded Array Message-ID: <19980529123029.12289@follo.net> In-Reply-To: <19980529122551.16212@follo.net>; from Eivind Eklund on Fri, May 29, 1998 at 12:25:51PM %2B0200 References: <509A2986E5C5D111B7DD0060082F32A402FAD1@freya.circle.net> <19980529122551.16212@follo.net>
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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-current" in the body of the message
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