replace one disk in isw RAID1 array

Wed Dec 1 14:32:46 UTC 2010

How did you add the new blank disk to the array?  ie, did you use the
Raid Setup in the BIOS to mark the disk as part of the array?  Or just
use dmraid commands?  I only have a little bit of experience with this,
but I believe the issue may have to do with the raid metadata on the new
disk being missing??

On 30/11/10 06:54 PM, Aaron Hanson wrote:
> Oops; forgot the most important command, where I try to initiate a rebuild with the new disk:
>
> bash (try 'info') lib > dmraid -dR isw_bdidaifdia_Raid1 /dev/sdb
> DEBUG: _find_set: searching isw_bdidaifdia
> DEBUG: _find_set: not found isw_bdidaifdia
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: not found isw_bdidaifdia_Raid1
> DEBUG: _find_set: not found isw_bdidaifdia_Raid1
> ERROR: isw: wrong number of devices in RAID set "isw_bdidaifdia_Raid1" [1/2] on /dev/sda
> DEBUG: set status of set "isw_bdidaifdia_Raid1" to 4
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> DEBUG: _find_set: found isw_bdidaifdia_Raid1
> ERROR: isw: only one failed disk supported
> metadata fmt update failed
>
> DEBUG: rebuild: raid "isw_bdidaifdia_Raid1" rebuild finished
>
> DEBUG: freeing devices of RAID set "isw_bdidaifdia_Raid1"
> DEBUG: freeing device "isw_bdidaifdia_Raid1", path "/dev/sda"
> DEBUG: freeing device "(null)", path "/dev/sdb"
> DEBUG: freeing devices of RAID set "isw_bdidaifdia"
> DEBUG: freeing device "isw_bdidaifdia", path "/dev/sda"
> DEBUG: freeing device "(null)", path "/dev/sdb"
>
>> -----Original Message-----
>> From: ataraid-list-bounces at redhat.com [mailto:ataraid-list-
>> bounces at redhat.com] On Behalf Of Aaron Hanson
>> Sent: Tuesday, November 30, 2010 3:49 PM
>> To: ataraid-list at redhat.com
>> Subject: replace one disk in isw RAID1 array
>>
>> Hi All -
>>
>> This seems like it should be a very common procedure.  I've researched this a
>> lot before bothering this list, I hope someone can comment. In short:
>>
>> -- I've created a mirror with 2 disks; it works fine.
>> -- I shut the system down, remove one disk and replace it with a blank disk.
>> -- Power up; array state is inconsistent.
>> -- New disk is 'sdb'.  I want to use 'dmraid' to rebuild the array with the new
>> disk, but I get errors. The most significant error seems to be:
>>     "ERROR: isw: only one failed disk supported"
>> -- 'dmraid ' continues to report that there is only one device in the set; the
>> request to rebuild with a new drive has clearly failed.
>>
>> The complete steps with additional version information and output is below.
>> Thanks in advance for any suggestions.  I would really appreciate references
>> to some tutorials with more 'dmraid' examples than shown in the man page
>> too, if such a thing exists.
>>
>>
>> -Aaron
>>
>> bash (try 'info') lib > uname -a
>> Linux localhost 2.6.18-194.26.1.el5.1.0.f5app #1 SMP Fri Nov 19 19:38:18 PST
>> 2010 x86_64 x86_64 x86_64 GNU/Linux
>> bash (try 'info') lib > dmraid --version
>> dmraid version:		1.0.0.rc16-3 (2010.11.12)
>> dmraid library version:	1.0.0.rc16-3 (2010.11.12)
>> device-mapper version:	4.11.5
>> bash (try 'info') lib > dmraid -s
>> ERROR: isw: wrong number of devices in RAID set "isw_bdidaifdia_Raid1"
>> [1/2] on /dev/sda
>> *** Group superset isw_bdidaifdia
>> --> *Inconsistent* Active Subset
>> name   : isw_bdidaifdia_Raid1
>> size   : 586062848
>> stride : 128
>> type   : mirror
>> status : inconsistent
>> subsets: 0
>> devs   : 1
>> spares : 0
>> bash (try 'info') lib > dmraid -r
>> /dev/sda: isw, "isw_bdidaifdia", GROUP, ok, 586072366 sectors, data@ 0
>> bash (try 'info') lib > dmraid -dR isw_bdidaifdia_Raid1 /dev/sdb
>> DEBUG: _find_set: searching isw_bdidaifdia
>> DEBUG: _find_set: not found isw_bdidaifdia
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: not found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: not found isw_bdidaifdia_Raid1
>> ERROR: isw: wrong number of devices in RAID set "isw_bdidaifdia_Raid1"
>> [1/2] on /dev/sda
>> DEBUG: set status of set "isw_bdidaifdia_Raid1" to 4
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: searching isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> DEBUG: _find_set: found isw_bdidaifdia_Raid1
>> ERROR: isw: only one failed disk supported metadata fmt update failed
>>
>> DEBUG: rebuild: raid "isw_bdidaifdia_Raid1" rebuild finished
>>
>> DEBUG: freeing devices of RAID set "isw_bdidaifdia_Raid1"
>> DEBUG: freeing device "isw_bdidaifdia_Raid1", path "/dev/sda"
>> DEBUG: freeing device "(null)", path "/dev/sdb"
>> DEBUG: freeing devices of RAID set "isw_bdidaifdia"
>> DEBUG: freeing device "isw_bdidaifdia", path "/dev/sda"
>> DEBUG: freeing device "(null)", path "/dev/sdb"
>> bash (try 'info') lib > dmraid -s
>> ERROR: isw: wrong number of devices in RAID set "isw_bdidaifdia_Raid1"
>> [1/2] on /dev/sda
>> *** Group superset isw_bdidaifdia
>> --> *Inconsistent* Active Subset
>> name   : isw_bdidaifdia_Raid1
>> size   : 586062848
>> stride : 128
>> type   : mirror
>> status : inconsistent
>> subsets: 0
>> devs   : 1
>> spares : 0
>>
>>
>>
>>
>>
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