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!
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