From mboxrd@z Thu Jan 1 00:00:00 1970 From: anon20120409 Subject: help needed - broken raid 1 array - I think I messed up Date: Sat, 23 Feb 2013 00:29:34 +0200 Message-ID: <5127F14E.3070600@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; 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 Hello everyone, I am not sure if I am using this mailing list correctly, but I have a big problem with my raid setup. So if anyone is interested, please help... I have a raid1 setup with 2 hdd. One day I saw in the SMART data of one on the disks that it had some bad sectors, so I thought I must replace that disk before it is too late. Following are the trial and error steps that I took and messed up the situation... While the pc was off, I diconected the hdd with the bad sectors and place in the same port a new disk (same model and brand). I entered the Matrix Raid system and as I remember it said something like "One of you disks needs to be rebuilt, do you want to do this?" and of course I presses yes. I tried to boot into ubuntu, but the drive was not mounted. So I thought I must sync the disks. I tried to mdadm --assemble --force, but the disks were in use by dmraid (which I didnt know that existed), so no results. I also tried different mdadm commands (--scan, --create, --examine), but I think nothing happened as the disks were busy by the dmraid. After, I plug all 3 disks and reboot. Probably bad idea. *root@archive:~# dmraid -r* /dev/sdd: isw, "isw_eacbgfdicf", GROUP, ok, 2930277166 sectors, data@ 0 (new empty disk) /dev/sdc: isw, "isw_eacbgfdicf", GROUP, ok, 2930277166 sectors, data@ 0 (old disk without bad sectors) /dev/sdb: isw, "isw_dbaiefcihd", GROUP, ok, 2930277166 sectors, data@ 0 (old disk with bad sectors) *root@archive:~# dmraid -ay * ERROR: isw: wrong number of devices in RAID set "isw_dbaiefcihd_Volume0" [1/2] on /dev/sdb ERROR: creating degraded mirror mapping for "isw_dbaiefcihd_Volume0" RAID set "isw_dbaiefcihd_Volume0" was not activated RAID set "isw_eacbgfdicf_Volume0" already active *root@archive:~# dmraid -s * ERROR: isw: wrong number of devices in RAID set "isw_dbaiefcihd_Volume0" [1/2] on /dev/sdb *** Group superset isw_dbaiefcihd --> *Inconsistent* Subset name : isw_dbaiefcihd_Volume0 size : 2930272512 stride : 128 type : mirror status : inconsistent subsets: 0 devs : 1 spares : 0 *** Group superset isw_eacbgfdicf --> Active Subset name : isw_eacbgfdicf_Volume0 size : 2930272512 stride : 128 type : mirror status : nosync subsets: 0 devs : 2 spares : 0 I reboot with only the 2 old disks pluged. *root@archive:~# dmraid -r* /dev/sdc: isw, "isw_eacbgfdicf", GROUP, ok, 2930277166 sectors, data@ 0 (old disk without bad sectors) /dev/sdb: isw, "isw_dbaiefcihd", GROUP, ok, 2930277166 sectors, data@ 0 (old disk with bad sectors) *root@archive:~# dmraid -s* ERROR: isw: wrong number of devices in RAID set "isw_dbaiefcihd_Volume0" [1/2] on /dev/sdb ERROR: isw: wrong number of devices in RAID set "isw_eacbgfdicf_Volume0" [1/2] on /dev/sdc *** Group superset isw_dbaiefcihd --> *Inconsistent* Subset name : isw_dbaiefcihd_Volume0 size : 2930272512 stride : 128 type : mirror status : inconsistent subsets: 0 devs : 1 spares : 0 *** Group superset isw_eacbgfdicf --> *Inconsistent* Subset name : isw_eacbgfdicf_Volume0 size : 2930272512 stride : 128 type : mirror status : inconsistent subsets: 0 devs : 1 spares : 0 *root@archive:~# sfdisk -d /dev/sdc | sfdisk /dev/sdb* Checking that no-one is using this disk right now ... OK Disk /dev/sdb: 182401 cylinders, 255 heads, 63 sectors/track sfdisk: ERROR: sector 0 does not have an msdos signature /dev/sdb: unrecognized partition table type Old situation: No partitions found sfdisk: ERROR: sector 0 does not have an msdos signature /dev/sdc: unrecognized partition table type No partitions found New situation: No partitions found sfdisk: no partition table present. *root@archive:~# dmraid -rE* Do you really want to erase "isw" ondisk metadata on /dev/sdc ? [y/n] :n Do you really want to erase "isw" ondisk metadata on /dev/sdb ? [y/n] :y *root@archive:~# dmraid -R isw_eacbgfdicf /dev/sdb* ERROR: isw: wrong number of devices in RAID set "isw_eacbgfdicf_Volume0" [1/2] on /dev/sdc isw: drive to rebuild: /dev/sdb RAID set "isw_eacbgfdicf_Volume0" was activated sgpio app not found sgpio app not found *root@archive:~# dmraid -r* /dev/sdc: isw, "isw_eacbgfdicf", GROUP, ok, 2930277166 sectors, data@ 0 /dev/sdb: isw, "isw_eacbgfdicf", GROUP, ok, 2930277166 sectors, data@ 0 *root@archive:~# dmraid -s* *** Group superset isw_eacbgfdicf --> Active Subset name : isw_eacbgfdicf_Volume0 size : 2930272512 stride : 128 type : mirror status : ok subsets: 0 devs : 2 spares : 0 *root@archive:~# dmsetup status* isw_eacbgfdicf_Volume0: 0 2930272520 mirror 2 8:16 8:32 22357/22357 1 AA 1 core *root@archive:~# sudo mount -a* mount: wrong fs type, bad option, bad superblock on /dev/mapper/isw_eacbgfdicf_Volume0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so *root@archive:~# dmraid -ay* RAID set "isw_eacbgfdicf_Volume0" already active and at this point I think that the old disk without bad sectors synced from the blank new disk and I lost everything, but I am not sure. Any help is very appreciated... Thanks in advance!