From owner-freebsd-current Fri May 29 01:27:21 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA01926 for freebsd-current-outgoing; Fri, 29 May 1998 01:27:21 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from caladan.tdx.co.uk (caladan.tdx.co.uk [195.188.177.4]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA01921 for ; Fri, 29 May 1998 01:27:17 -0700 (PDT) (envelope-from kpielorz@tdx.co.uk) Received: from tdx.co.uk (lorca-tx.tdx.co.uk [195.188.177.242]) by caladan.tdx.co.uk (8.8.8/8.8.8) with ESMTP id JAA26011; Fri, 29 May 1998 09:27:14 +0100 (BST) (envelope-from kpielorz@tdx.co.uk) Message-ID: <356E7162.91E85509@tdx.co.uk> Date: Fri, 29 May 1998 09:27:14 +0100 From: Karl Pielorz Organization: TDX X-Mailer: Mozilla 4.05 [en] (WinNT; I) MIME-Version: 1.0 To: tcobb CC: current@FreeBSD.ORG Subject: Re: DPT driver fails and panics with Degraded Array References: <509A2986E5C5D111B7DD0060082F32A402FACD@freya.circle.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG tcobb wrote: > > With an array of that size, on a machine that important - did > > you not test > > to see what would happen with a failed drive? > > Despite pre-certification testing, something will be different when you > have a failure in production. The difference in our case, I'm guessing, > was that the array is now 60-75% full, and the OS version is different, > and the system was under heavy access load, too. The original driver > was an over-hacked version stuffed into 2.2.2, the newest driver IS > better integrated, and actually faster, but obviously unable to handle > the under-load failure situation in exactly the way we had it happen. We did our tests under load, but not with a 'full' array (it was at about 20-30%)... We've never changed the operating system 'under' it, I know that it would be checked again if the driver was ever changed (and to be honest it would have to be a pretty dire problem to change the driver while the machines 'online' - it would normally be made off-line or taken out the loop first). I'll also admit that we were looking at the DPT solution for our next FreeBSD box... I think we'll either wait a while now (or I'll just keep quiet and add a few extra weeks to the testing phase for the machine - I'd prefer the latter for obvious reasons... ;-) Regards, Karl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message