From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Valarti Subject: =?UTF-8?Q?Re=3AServer_down=2Dfail=E2=80=8Bed_RAID5=2Dasking_for_some_assis?= =?UTF-8?Q?tance?= Date: Thu, 21 Apr 2011 20:32:57 -0600 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Thu, Apr 21, 2011 at 1:59 PM, David Brown = wrote: =2E > My first thought would be to get /all/ the disks, not just the "faile= d" > ones, out of the machine. =A0You want to make full images of them (wi= th > ddrescue or something similar) to files on another disk, and then wor= k with > those images. =A0.. > Once you've got some (hopefully most) of your data recovered from the > images, buy four /new/ disks to put in the machine, and work on your > restore. =A0You don't want to reuse the failing disks, and probably t= he other > two equally old and worn disks will be high risk too. OK, I think I understand. Does that mean I need to buy 8 disks, all the same size or bigger? The originals are 250GB SATA so that should be OK, I guess. I read some more and found out I should run mdadm --examine. Should I not be able to just add the one disk partition sdc2 back to th= e RAID? Here is the result of --examine /dev/sda2: =A0 =A0 =A0 =A0 =A0Magic : a92b4efc =A0 =A0 =A0 =A0Version : 0.90.00 =A0 =A0 =A0 =A0 =A0 UUID : ddf4d448:36afa319:f0917855:03f8bbe8 =A0Creation Time : Mon May 15 16:38:05 2006 =A0 =A0 Raid Level : raid5 =A0Used Dev Size : 244975104 (233.63 GiB 250.85 GB) =A0 =A0 Array Size : 734925312 (700.88 GiB 752.56 GB) =A0 Raid Devices : 4 =A0Total Devices : 3 Preferred Minor : 1 =A0 =A0Update Time : Mon Apr 18 07:48:54 2011 =A0 =A0 =A0 =A0 =A0State : clean Active Devices : 3 Working Devices : 3 =46ailed Devices : 1 =A0Spare Devices : 0 =A0 =A0 =A0 Checksum : 5674ce60 - correct =A0 =A0 =A0 =A0 Events : 28580020 =A0 =A0 =A0 =A0 Layout : left-symmetric =A0 =A0 Chunk Size : 256K =A0 =A0 =A0Number =A0 Major =A0 Minor =A0 RaidDevice State this =A0 =A0 1 =A0 =A0 =A0 8 =A0 =A0 =A0 18 =A0 =A0 =A0 =A01 =A0 =A0 =A0= active sync =A0 /dev/sdb2 =A0 0 =A0 =A0 0 =A0 =A0 =A0 8 =A0 =A0 =A0 =A02 =A0 =A0 =A0 =A00 =A0 =A0= =A0active sync =A0 /dev/sda2 =A0 1 =A0 =A0 1 =A0 =A0 =A0 8 =A0 =A0 =A0 18 =A0 =A0 =A0 =A01 =A0 =A0 =A0= active sync =A0 /dev/sdb2 =A0 2 =A0 =A0 2 =A0 =A0 =A0 8 =A0 =A0 =A0 34 =A0 =A0 =A0 =A02 =A0 =A0 =A0= active sync =A0 /dev/sdc2 =A0 3 =A0 =A0 3 =A0 =A0 =A0 0 =A0 =A0 =A0 =A00 =A0 =A0 =A0 =A03 =A0 =A0= =A0faulty removed /dev/sdb2: =A0 =A0 =A0 =A0 =A0Magic : a92b4efc =A0 =A0 =A0 =A0Version : 0.90.00 =A0 =A0 =A0 =A0 =A0 UUID : ddf4d448:36afa319:f0917855:03f8bbe8 =A0Creation Time : Mon May 15 16:38:05 2006 =A0 =A0 Raid Level : raid5 =A0Used Dev Size : 244975104 (233.63 GiB 250.85 GB) =A0 =A0 Array Size : 734925312 (700.88 GiB 752.56 GB) =A0 Raid Devices : 4 =A0Total Devices : 4 Preferred Minor : 1 =A0 =A0Update Time : Sun Oct 18 10:04:06 2009 =A0 =A0 =A0 =A0 =A0State : active Active Devices : 4 Working Devices : 4 =46ailed Devices : 0 =A0Spare Devices : 0 =A0 =A0 =A0 Checksum : 5171dcb2 - correct =A0 =A0 =A0 =A0 Events : 20333614 =A0 =A0 =A0 =A0 Layout : left-symmetric =A0 =A0 Chunk Size : 256K =A0 =A0 =A0Number =A0 Major =A0 Minor =A0 RaidDevice State this =A0 =A0 3 =A0 =A0 =A0 8 =A0 =A0 =A0 50 =A0 =A0 =A0 =A03 =A0 =A0 =A0= active sync =A0 /dev/sdd2 =A0 0 =A0 =A0 0 =A0 =A0 =A0 8 =A0 =A0 =A0 =A02 =A0 =A0 =A0 =A00 =A0 =A0= =A0active sync =A0 /dev/sda2 =A0 1 =A0 =A0 1 =A0 =A0 =A0 8 =A0 =A0 =A0 18 =A0 =A0 =A0 =A01 =A0 =A0 =A0= active sync =A0 /dev/sdb2 =A0 2 =A0 =A0 2 =A0 =A0 =A0 8 =A0 =A0 =A0 34 =A0 =A0 =A0 =A02 =A0 =A0 =A0= active sync =A0 /dev/sdc2 =A0 3 =A0 =A0 3 =A0 =A0 =A0 8 =A0 =A0 =A0 50 =A0 =A0 =A0 =A03 =A0 =A0 =A0= active sync =A0 /dev/sdd2 /dev/sdc2: =A0 =A0 =A0 =A0 =A0Magic : a92b4efc =A0 =A0 =A0 =A0Version : 0.90.00 =A0 =A0 =A0 =A0 =A0 UUID : ddf4d448:36afa319:f0917855:03f8bbe8 =A0Creation Time : Mon May 15 16:38:05 2006 =A0 =A0 Raid Level : raid5 =A0Used Dev Size : 244975104 (233.63 GiB 250.85 GB) =A0 =A0 Array Size : 734925312 (700.88 GiB 752.56 GB) =A0 Raid Devices : 4 =A0Total Devices : 3 Preferred Minor : 1 =A0 =A0Update Time : Mon Apr 18 07:48:51 2011 =A0 =A0 =A0 =A0 =A0State : clean Active Devices : 3 Working Devices : 3 =46ailed Devices : 1 =A0Spare Devices : 0 =A0 =A0 =A0 Checksum : 5674ce6b - correct =A0 =A0 =A0 =A0 Events : 28580018 =A0 =A0 =A0 =A0 Layout : left-symmetric =A0 =A0 Chunk Size : 256K =A0 =A0 =A0Number =A0 Major =A0 Minor =A0 RaidDevice State this =A0 =A0 2 =A0 =A0 =A0 8 =A0 =A0 =A0 34 =A0 =A0 =A0 =A02 =A0 =A0 =A0= active sync =A0 /dev/sdc2 =A0 0 =A0 =A0 0 =A0 =A0 =A0 8 =A0 =A0 =A0 =A02 =A0 =A0 =A0 =A00 =A0 =A0= =A0active sync =A0 /dev/sda2 =A0 1 =A0 =A0 1 =A0 =A0 =A0 8 =A0 =A0 =A0 18 =A0 =A0 =A0 =A01 =A0 =A0 =A0= active sync =A0 /dev/sdb2 =A0 2 =A0 =A0 2 =A0 =A0 =A0 8 =A0 =A0 =A0 34 =A0 =A0 =A0 =A02 =A0 =A0 =A0= active sync =A0 /dev/sdc2 =A0 3 =A0 =A0 3 =A0 =A0 =A0 0 =A0 =A0 =A0 =A00 =A0 =A0 =A0 =A03 =A0 =A0= =A0faulty removed /dev/sdd2: =A0 =A0 =A0 =A0 =A0Magic : a92b4efc =A0 =A0 =A0 =A0Version : 0.90.00 =A0 =A0 =A0 =A0 =A0 UUID : ddf4d448:36afa319:f0917855:03f8bbe8 =A0Creation Time : Mon May 15 16:38:05 2006 =A0 =A0 Raid Level : raid5 =A0Used Dev Size : 244975104 (233.63 GiB 250.85 GB) =A0 =A0 Array Size : 734925312 (700.88 GiB 752.56 GB) =A0 Raid Devices : 4 =A0Total Devices : 3 Preferred Minor : 1 =A0 =A0Update Time : Mon Apr 18 07:48:54 2011 =A0 =A0 =A0 =A0 =A0State : clean Active Devices : 3 Working Devices : 3 =46ailed Devices : 1 =A0Spare Devices : 0 =A0 =A0 =A0 Checksum : 5674ce4e - correct =A0 =A0 =A0 =A0 Events : 28580020 =A0 =A0 =A0 =A0 Layout : left-symmetric =A0 =A0 Chunk Size : 256K =A0 =A0 =A0Number =A0 Major =A0 Minor =A0 RaidDevice State this =A0 =A0 0 =A0 =A0 =A0 8 =A0 =A0 =A0 =A02 =A0 =A0 =A0 =A00 =A0 =A0 = =A0active sync =A0 /dev/sda2 =A0 0 =A0 =A0 0 =A0 =A0 =A0 8 =A0 =A0 =A0 =A02 =A0 =A0 =A0 =A00 =A0 =A0= =A0active sync =A0 /dev/sda2 =A0 1 =A0 =A0 1 =A0 =A0 =A0 8 =A0 =A0 =A0 18 =A0 =A0 =A0 =A01 =A0 =A0 =A0= active sync =A0 /dev/sdb2 =A0 2 =A0 =A0 2 =A0 =A0 =A0 8 =A0 =A0 =A0 34 =A0 =A0 =A0 =A02 =A0 =A0 =A0= active sync =A0 /dev/sdc2 =A0 3 =A0 =A0 3 =A0 =A0 =A0 0 =A0 =A0 =A0 =A00 =A0 =A0 =A0 =A03 =A0 =A0= =A0faulty removed -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html