Hello,
I am experiencing some issues with my md raid. It is crashing my system
when accessed with any "verve". The reboot initiates a resync of the
raid. I have gone through the crash/reboot/resynced a number of times
now and the crash happens within minutes of mounting the raid.
Here are some details:
- It is a raid 6 with 7 3TB devices.
- Formatted as EXT4
- mdadm v3.2.6 - 25th October 2012
- centos 6.5 kernel 2.6.32-431.3.1.el6.x86_64
- It has been running flawlessly for the previous 6 months.
- I have a cron script running that resyncs monthly.
- When the raid is unmounted, the system runs fine. (I have an
additional "dumb" hardware raid 1 for dailies attached to an ESATA port.
This runs perfectly).
- I am in the process of re-syncing the raid 6 again right now.
- I have run an fsck on the raid volume after it was fully synced and
everything came up clean.
- there have been lots of power outages the last while with the hot
summer in Toronto. My UPS shuts the system down for me, though I think I
can correlate the issues with the power outages.
Below are the printouts from /proc/mdstat and mdadm --examine
I am not very experienced with mdadm and am a newbie with linux. Any
assistance you might be able to offer would be appreciated.
Best,
- Justin
-----------------------------
/proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid6 sdg1[4] sdh1[5] sdf1[3] sdc1[0] sde1[2] sdd1[1]
sdb1[6]
14650666880 blocks super 1.2 level 6, 128k chunk, algorithm 2
[7/7] [UUUUUUU]
[>....................] resync = 4.7% (138332896/2930133376)
finish=353.0min speed=131774K/sec
------------------------------
mdadm --examine
[root@BigBlue Desktop]# mdadm --examine /dev/sd[b-h]1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 7f7ace48:01a4b6f6:bf182ae3:6acddef9
Update Time : Fri Jul 4 09:26:41 2014
Checksum : a1aab985 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 6
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 8a4d11bd:fe387740:1edc1151:b0ebba43
Update Time : Fri Jul 4 09:26:41 2014
Checksum : 1772032b - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 0
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : aa158e32:f4449a9b:73e95000:22852278
Update Time : Fri Jul 4 09:26:41 2014
Checksum : cbb87e08 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 1
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 7bee5d42:cb66c602:162e88f1:e140447c
Update Time : Fri Jul 4 09:26:41 2014
Checksum : 380d7914 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 2
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sdf1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : b4a7b35c:6e377711:4b291874:edb2c4d0
Update Time : Fri Jul 4 09:26:41 2014
Checksum : 38247032 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 3
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sdg1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 7c0bba5a:6b205302:d026a78d:91f5ebdd
Update Time : Fri Jul 4 09:26:41 2014
Checksum : 4dbcfd29 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 4
Array State : AAAAAAA ('A' == active, '.' == missing)
/dev/sdh1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0849c677:64e4772e:8892d80b:47e0097a
Name : BigBlue:0 (local to host BigBlue)
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Raid Devices : 7
Avail Dev Size : 5860267024 (2794.39 GiB 3000.46 GB)
Array Size : 14650666880 (13971.97 GiB 15002.28 GB)
Used Dev Size : 5860266752 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : a750a146:7ee7383e:2929d803:2bee9dc1
Update Time : Fri Jul 4 09:26:41 2014
Checksum : cf6d0452 - correct
Events : 10631
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 5
Array State : AAAAAAA ('A' == active, '.' == missing)
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