From owner-freebsd-hardware Sat Sep 20 05:14:46 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id FAA02185 for hardware-outgoing; Sat, 20 Sep 1997 05:14:46 -0700 (PDT) Received: from istari.home.net (cc158233-a.catv1.md.home.com [24.3.25.17]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id FAA02180 for ; Sat, 20 Sep 1997 05:14:44 -0700 (PDT) Received: (from sjr@localhost) by istari.home.net (8.8.7/8.8.6) id IAA08327; Sat, 20 Sep 1997 08:14:40 -0400 (EDT) Date: Sat, 20 Sep 1997 08:14:40 -0400 (EDT) From: "Stephen J. Roznowski" Message-Id: <199709201214.IAA08327@istari.home.net> To: mark@quickweb.com, freebsd-hardware@FreeBSD.ORG Subject: Re: HD failure; possible causes?? In-Reply-To: Mail from 'Mark Mayo ' dated: Fri, 19 Sep 1997 23:00:16 -0400 Sender: owner-freebsd-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > From: Mark Mayo > Subject: HD failure; possible causes?? > > Hi all. Well, this weekend I had a couple of CCD disk arrays go belly up, > and I'm curious if anyone has had any experience with multiple disks > crashing at once. While it sounds like you've figured out this problem, one thing to remember when you are building disk arrays is to use disks from different production runs. When you start to approach the MTTF for drives, the ones in the same production run tend to fail at about the same time (i.e. the bell curve for MTTF is more of a spike). Getting drives from different production runs gives you a larger bell.... -SR