Sent: Sun Dec 12 2010 20:37:56 GMT-0700 (Mountain Standard Time)
From: Patrick H. <linux-raid@xxxxxxxxxxxx>
To: no To-header on input <unlisted-recipients:;> linux-raid@xxxxxxxxxxxxxxx
Subject: Re: md device renaming
Sent: Sun Dec 12 2010 20:13:47 GMT-0700 (Mountain Standard Time)
From: Neil Brown <neilb@xxxxxxx>
To: Patrick H. <linux-raid@xxxxxxxxxxxx> linux-raid@xxxxxxxxxxxxxxx
Subject: Re: md device renaming
Sorry, I obviously didn't read properly...
It must be getting the old name from somewhere.
I would
- stop the array
- use "mdadm -E" to examine each device and see what name is recorded.
- look in /etc/mdadm.conf to see what name is there.
- check /dev/.mdadm/map or possible /var/run/mdadm/map to see if the
array is mentioned in there (it shouldn't be).
to find out where the old name still is. Then at least you know what
needs
fixing.
Just for completeness: what version of mdadm are you using?
NeilBrown
At the bottom is the output from the `mdadm -E` after stopping the
array. None of them say anything about the old name
I'm not using mdadm.conf. This is part of a HA cluster, so I'm trying
not to keep any info in local files, but all in the HA software
(pacemaker). The only thing in mdadm.conf is "MAILADDR root" and "AUTO
-all"
/dev/.mdadm/ is completely empty, and /var/run/mdadm/map doesnt exist
either (just a pid file in that dir)
# mdadm --version
mdadm - v3.1.3 - 6th August 2010
# uname -r
2.6.32-71.el6.x86_64
The first 2 disks are the ones that ended up in the array. The third
disk is one I failed out so its not in it
# mdadm -E
/dev/disk/by-path/ip-165.212.101.241\:3260-iscsi-iqn.165.212.101.240\:nas01.sdb1-lun-1
/dev/disk/by-path/ip-165.212.101.241:3260-iscsi-iqn.165.212.101.240:nas01.sdb1-lun-1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : abddf4ea:06524e68:8e2b8f4e:1b24c56d
Name : nas01:126 (local to host nas01)
Creation Time : Thu Dec 9 20:41:53 2010
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 524032 (255.92 MiB 268.30 MB)
Array Size : 1048064 (511.84 MiB 536.61 MB)
Data Offset : 224 sectors
Super Offset : 8 sectors
State : clean
Device UUID : c38615d5:53c09e0c:33160bea:237031fd
Update Time : Mon Dec 13 03:28:28 2010
Checksum : 7e6f1bdd - correct
Events : 4321
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 0
Array State : AA. ('A' == active, '.' == missing)
2010/12/13 03:28:35
root@nas01 /etc/syslog-ng # mdadm -E
/dev/disk/by-path/ip-165.212.101.242\:3260-iscsi-iqn.165.212.101.240\:nas02.sdb1-lun-1
/dev/disk/by-path/ip-165.212.101.242:3260-iscsi-iqn.165.212.101.240:nas02.sdb1-lun-1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : abddf4ea:06524e68:8e2b8f4e:1b24c56d
Name : nas01:126 (local to host nas01)
Creation Time : Thu Dec 9 20:41:53 2010
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 524032 (255.92 MiB 268.30 MB)
Array Size : 1048064 (511.84 MiB 536.61 MB)
Data Offset : 224 sectors
Super Offset : 8 sectors
State : clean
Device UUID : aab5bf73:94242880:8d28b333:f0c88918
Update Time : Mon Dec 13 03:28:39 2010
Checksum : f5a31a3a - correct
Events : 4325
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 1
Array State : AA. ('A' == active, '.' == missing)
# mdadm -E
/dev/disk/by-path/ip-165.212.101.243\:3260-iscsi-iqn.165.212.101.240\:nas03.sdb1-lun-1
/dev/disk/by-path/ip-165.212.101.243:3260-iscsi-iqn.165.212.101.240:nas03.sdb1-lun-1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : abddf4ea:06524e68:8e2b8f4e:1b24c56d
Name : nas01:iscsi-sdb1 (local to host nas01)
Creation Time : Thu Dec 9 20:41:53 2010
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 524032 (255.92 MiB 268.30 MB)
Array Size : 1048064 (511.84 MiB 536.61 MB)
Data Offset : 224 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 78faaa98:22154538:aeeab927:19a62875
Update Time : Mon Dec 13 03:03:18 2010
Checksum : c358be3f - correct
Events : 3731
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 2
Array State : AAA ('A' == active, '.' == missing)
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Well, I just re-assembled the array after I stopped it to get the `mdadm
-E` data, and now the /dev/md/ entry is named correctly. I guess I just
had to stop it and reassemble it after doing the '-U name'. Still think
that might be a bug though that it says "/dev/md/nas01:iscsi-sdb1 has
been started" but it really called it something else.
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