From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kyler Laird Subject: Re: "cannot start dirty degraded array" Date: Mon, 15 Jun 2009 11:57:37 -0400 Message-ID: <20090615155737.GU18313@lairds.com> References: <20090610200310.GF18313@lairds.com> <4A366EAE.9010706@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <4A366EAE.9010706@tmr.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Mon, Jun 15, 2009 at 11:54:22AM -0400, Bill Davidsen wrote: > Just a thought, when multiple units have errors at the same time, I > suspect a power issue. And if these are real SCSI drives, it's possible > for a drive to fail in such a way that it glitches the SCSI bus and > causes the controller to think that multiple drives doing concurrent > seeks have failed. I saw this often enough to have a script to force the > controller to mark drives good and then test them one at a time when I > was running ISP servers. The X4540 has 48 SATA drives. We've had a couple X4500s (similar) in similar service for awhile with no problems. I hadn't considered power being a potential problem but I'll keep it in mind. Thank you. --kyler