From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Marcin M. Jessa" Subject: Linux raid autodetect partition disappears after RAID degrade Date: Sun, 02 Oct 2011 12:05:29 +0200 Message-ID: <4E883769.2080402@yazzy.org> Reply-To: lists@yazzy.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi guys. My RAID array just kicked out one of the drives again at heavy activity running: # ddrescue -n -f /dev/fridge/storage storage.img ddrescue.log where the /dev/fridge/storage LV Size is 4.88 TiB What's strange is the device is there: brw-rw---- 1 root disk 8, 144 Oct 2 11:48 /dev/sdj But the /dev/sdj1 which should hold Linux raid autodetect partition just disappeared... # fdisk -l /dev/sdj Disk /dev/sdj: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdj1 63 3907029167 1953514552+ fd Linux raid autodetect Is this a normal behavior? I don't understand either why the heck is the RAID degrading all the time ? I replaced all the cables with SATA3 cables, the BIOS is updated, both the motherboard and the drives are SATA3 and brand new. I could not find anything about the RAID being degraded or the device having problems in dmesg, /var/log/messages, /var/log/syslog or /var/log/kern.log I'm on Debian Wheezy # uname -a Linux odin 3.0.0-1-amd64 #1 SMP Sat Aug 27 16:21:11 UTC 2011 x86_64 GNU/Linux -- Marcin M. Jessa