From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Subject: Re: data recovery on raid5 Date: Sat, 22 Apr 2006 13:32:15 -0700 Message-ID: <444A92CF.70401@abhost.net> References: <444A7C99.80006@abhost.net> <62b0912f0604221248s653843bfx363f346c7ef31a94@mail.gmail.com> <444A8D04.20809@abhost.net> <62b0912f0604221322k25c96c37q2bee9361a6316c1b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <62b0912f0604221322k25c96c37q2bee9361a6316c1b@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Well, the block sizes are back to 32k now, but I still had no luck mounting /dev/md0 once I created the array. below is a record of what I just tried: how safe should the following be? mdadm --assemble /dev/md0 --uuid=8fe1fe85:eeb90460:c525faab:cdaab792 /dev/etherd/e0.[01234] I am *really* not interested in making my situation worse. -- Jonathan hazel /virtual # mdadm -C /dev/md0 -c 32 -n 4 -l 5 missing /dev/etherd/e0.[023] mdadm: /dev/etherd/e0.0 appears to be part of a raid array: level=5 devices=4 ctime=Fri Apr 21 22:56:18 2006 mdadm: /dev/etherd/e0.2 appears to be part of a raid array: level=5 devices=4 ctime=Fri Apr 21 22:56:18 2006 mdadm: /dev/etherd/e0.3 appears to contain an ext2fs file system size=720300416K mtime=Wed Oct 5 16:39:28 2005 mdadm: /dev/etherd/e0.3 appears to be part of a raid array: level=5 devices=4 ctime=Fri Apr 21 22:56:18 2006 Continue creating array? y mdadm: array /dev/md0 started. hazel /virtual # cat /proc/mdstat Personalities : [raid5] md1 : active raid5 etherd/e0.9[4] etherd/e0.8[3] etherd/e0.7[2] etherd/e0.6[1] etherd/e0.5[0] 586082688 blocks level 5, 32k chunk, algorithm 0 [4/4] [UUUU] md0 : active raid5 etherd/e0.3[3] etherd/e0.2[2] etherd/e0.0[1] 586082688 blocks level 5, 32k chunk, algorithm 2 [4/3] [_UUU] unused devices: hazel /virtual # mount -t ext2 -r /dev/md0 /md0 mount: wrong fs type, bad option, bad superblock on /dev/md0, or too many mounted file systems hazel /virtual # mdadm -S /dev/md0 hazel /virtual # cat /proc/mdstat Personalities : [raid5] md1 : active raid5 etherd/e0.9[4] etherd/e0.8[3] etherd/e0.7[2] etherd/e0.6[1] etherd/e0.5[0] 586082688 blocks level 5, 32k chunk, algorithm 0 [4/4] [UUUU] unused devices: hazel /virtual # mdadm -E /dev/etherd/e0.[01234] /dev/etherd/e0.0: Magic : a92b4efc Version : 00.90.02 UUID : 518b5d59:44292ca3:6c358813:c6f00804 Creation Time : Sat Apr 22 13:25:40 2006 Raid Level : raid5 Device Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 3 Preferred Minor : 0 Update Time : Sat Apr 22 13:25:40 2006 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Checksum : 6aaa56f - correct Events : 0.3493635 Layout : left-symmetric Chunk Size : 32K Number Major Minor RaidDevice State this 1 152 0 1 active sync /dev/etherd/e0.0 0 0 0 0 0 removed 1 1 152 0 1 active sync /dev/etherd/e0.0 2 2 152 32 2 active sync /dev/etherd/e0.2 3 3 152 48 3 active sync /dev/etherd/e0.3 /dev/etherd/e0.1: Magic : a92b4efc Version : 00.90.00 UUID : 8fe1fe85:eeb90460:c525faab:cdaab792 Creation Time : Mon Jan 3 03:16:48 2005 Raid Level : raid5 Device Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 5 Preferred Minor : 0 Update Time : Fri Apr 21 14:03:12 2006 State : clean Active Devices : 2 Working Devices : 3 Failed Devices : 3 Spare Devices : 1 Checksum : 4cc991d7 - correct Events : 0.3493633 Layout : left-asymmetric Chunk Size : 32K Number Major Minor RaidDevice State this 4 152 16 4 spare /dev/etherd/e0.1 0 0 0 0 0 removed 1 1 0 0 1 faulty removed 2 2 152 32 2 active sync /dev/etherd/e0.2 3 3 152 48 3 active sync /dev/etherd/e0.3 4 4 152 16 4 spare /dev/etherd/e0.1 /dev/etherd/e0.2: Magic : a92b4efc Version : 00.90.02 UUID : 518b5d59:44292ca3:6c358813:c6f00804 Creation Time : Sat Apr 22 13:25:40 2006 Raid Level : raid5 Device Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 3 Preferred Minor : 0 Update Time : Sat Apr 22 13:25:40 2006 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Checksum : 6aaa591 - correct Events : 0.3493635 Layout : left-symmetric Chunk Size : 32K Number Major Minor RaidDevice State this 2 152 32 2 active sync /dev/etherd/e0.2 0 0 0 0 0 removed 1 1 152 0 1 active sync /dev/etherd/e0.0 2 2 152 32 2 active sync /dev/etherd/e0.2 3 3 152 48 3 active sync /dev/etherd/e0.3 /dev/etherd/e0.3: Magic : a92b4efc Version : 00.90.02 UUID : 518b5d59:44292ca3:6c358813:c6f00804 Creation Time : Sat Apr 22 13:25:40 2006 Raid Level : raid5 Device Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 3 Preferred Minor : 0 Update Time : Sat Apr 22 13:25:40 2006 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Checksum : 6aaa5a3 - correct Events : 0.3493635 Layout : left-symmetric Chunk Size : 32K Number Major Minor RaidDevice State this 3 152 48 3 active sync /dev/etherd/e0.3 0 0 0 0 0 removed 1 1 152 0 1 active sync /dev/etherd/e0.0 2 2 152 32 2 active sync /dev/etherd/e0.2 3 3 152 48 3 active sync /dev/etherd/e0.3 /dev/etherd/e0.4: Magic : a92b4efc Version : 00.90.00 UUID : 8fe1fe85:eeb90460:c525faab:cdaab792 Creation Time : Mon Jan 3 03:16:48 2005 Raid Level : raid5 Device Size : 195360896 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 5 Preferred Minor : 0 Update Time : Thu Apr 20 21:07:50 2006 State : clean Active Devices : 4 Working Devices : 5 Failed Devices : 0 Spare Devices : 1 Checksum : 4cc84d59 - correct Events : 0.3482550 Layout : left-asymmetric Chunk Size : 32K Number Major Minor RaidDevice State this 0 152 64 0 active sync /dev/etherd/e0.4 0 0 152 64 0 active sync /dev/etherd/e0.4 1 1 152 0 1 active sync /dev/etherd/e0.0 2 2 152 32 2 active sync /dev/etherd/e0.2 3 3 152 48 3 active sync /dev/etherd/e0.3 4 4 152 16 4 spare /dev/etherd/e0.1