From mboxrd@z Thu Jan 1 00:00:00 1970 From: Massimiliano Masserelli Subject: RAID1 root - troubles booting in degraded mode Date: Wed, 30 Oct 2002 00:07:51 +0100 Sender: linux-raid-owner@vger.kernel.org Message-ID: <20021029230751.GP1472@sgabanaz.interim.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi folks! I've taken a look at the ML archives, and found an old thread (06/2002) on this subject, but found no solution. I've a working setup with a two disks RAID1 root, which boots flawlessly. Troubles arise when simulating hw failure. RAID setup is as follows: raiddev /dev/md0 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 chunk-size 4 device /dev/hda1 raid-disk 0 device /dev/hdc1 raid-disk 1 If I disconnect /dev/hda before booting, the kernel tries to initialize the array, can't access /dev/hda1 (no wonder), marks it as faulty, then refuses to initialize the array, dieing with a kernel panic, unable to mount root. If I disconnect /dev/hdc before booting, the array gets started in degraded mode, and the startup goes on without a glitch. If I disconnect /dev/hda and move /dev/hdc to its place (so it's now /dev/hda), the array gets started in degraded mode and the startup goes on. Actually, this is already a workable solution (if the first disk dies, I just "promote" the second to hda and go looking for a replacement of the broken disk), but I think this is not _elegant_. 8) Could anyone help me shedding some light on the subject? Tnx in advance. -- Massimiliano Masserelli ------------------------------------------------------------------------------- Mayor: "Uh... try to have her home by eleven." --Buffy the Vampire Slayer: Enemies