* 'Array state: ... 1 failed', but array clean?
@ 2010-01-28 12:09 Michał Sawicz
2010-01-28 12:59 ` Michał Sawicz
0 siblings, 1 reply; 3+ messages in thread
From: Michał Sawicz @ 2010-01-28 12:09 UTC (permalink / raw)
To: linux-raid
[-- Attachment #1.1: Type: text/plain, Size: 684 bytes --]
Hi,
Can anyone please explain this to me:
> # cat /proc/mdstat
>
> Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
> md2 : active raid5 sdf1[0] sde1[5] sdb1[6] sda1[3] sdd1[2] sdc1[4]
> 4883799040 blocks super 1.1 level 5, 256k chunk, algorithm 2
> [6/6] [UUUUUU]
Everything looks peachy, but:
> # mdadm -E /dev/sda1
> [...]
> Array Slot : 3 (0, failed, 2, 3, 1, 5, 4)
> Array State : uuuUuu 1 failed
Where does this 'failed' come from? Oh, and it's like that on all
members. Is my array safe as /proc/mdstat says?
See attached file for full info from mdadm -E for all the drives.
--
Pozdrawiam
Michał (Saviq) Sawicz
[-- Attachment #1.2: md2 --]
[-- Type: text/plain, Size: 5464 bytes --]
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md2 : active raid5 sdf1[0] sde1[5] sdb1[6] sda1[3] sdd1[2] sdc1[4]
4883799040 blocks super 1.1 level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]
unused devices: <none>
root@sysresccd /mnt/big % mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : 5d5eda8d:0a511d8f:b5cbdfc1:62553e46
Update Time : Thu Jan 28 12:02:47 2010
Checksum : 75ee8731 - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 3 (0, failed, 2, 3, 1, 5, 4)
Array State : uuuUuu 1 failed
root@sysresccd /mnt/big % mdadm -E /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : db2e5ae0:a98c1483:6b337782:d80712f7
Update Time : Thu Jan 28 12:02:54 2010
Checksum : 2dd0ad85 - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 6 (0, failed, 2, 3, 1, 5, 4)
Array State : uuuuUu 1 failed
root@sysresccd /mnt/big % mdadm -E /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : b4cd2c65:29502d62:08a12716:e2f159a0
Update Time : Thu Jan 28 12:02:54 2010
Checksum : ceb46781 - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 4 (0, failed, 2, 3, 1, 5, 4)
Array State : uUuuuu 1 failed
root@sysresccd /mnt/big % mdadm -E /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : 8e6a9f57:a33fd6eb:eb8514fc:247b362b
Update Time : Thu Jan 28 12:02:54 2010
Checksum : bb9961f9 - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 2 (0, failed, 2, 3, 1, 5, 4)
Array State : uuUuuu 1 failed
root@sysresccd /mnt/big % mdadm -E /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : 5d5eda8d:0a511d8f:b5cbdfc1:62553e46
Update Time : Thu Jan 28 12:02:54 2010
Checksum : 75ee873a - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 5 (0, failed, 2, 3, 1, 5, 4)
Array State : uuuuuU 1 failed
root@sysresccd /mnt/big % mdadm -E /dev/sdf1
/dev/sdf1:
Magic : a92b4efc
Version : 1.1
Feature Map : 0x0
Array UUID : 9ce41f94:7489a7f2:6897e4b5:269c8b3b
Name : media:2
Creation Time : Sun Jan 24 21:32:58 2010
Raid Level : raid5
Raid Devices : 6
Avail Dev Size : 1953519738 (931.51 GiB 1000.20 GB)
Array Size : 9767598080 (4657.55 GiB 5001.01 GB)
Used Dev Size : 1953519616 (931.51 GiB 1000.20 GB)
Data Offset : 264 sectors
Super Offset : 0 sectors
State : clean
Device UUID : fbdd8977:5c6a0b13:f1f792cb:6039ee70
Update Time : Thu Jan 28 12:02:54 2010
Checksum : 17ef305f - correct
Events : 645036
Layout : left-symmetric
Chunk Size : 256K
Array Slot : 0 (0, failed, 2, 3, 1, 5, 4)
Array State : Uuuuuu 1 failed
root@sysresccd /mnt/big %
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 'Array state: ... 1 failed', but array clean?
2010-01-28 12:09 'Array state: ... 1 failed', but array clean? Michał Sawicz
@ 2010-01-28 12:59 ` Michał Sawicz
2010-01-29 9:44 ` Neil Brown
0 siblings, 1 reply; 3+ messages in thread
From: Michał Sawicz @ 2010-01-28 12:59 UTC (permalink / raw)
To: linux-raid
[-- Attachment #1: Type: text/plain, Size: 505 bytes --]
Dnia 2010-01-28, czw o godzinie 13:09 +0100, Michał Sawicz pisze:
> Where does this 'failed' come from? Oh, and it's like that on all
> members. Is my array safe as /proc/mdstat says?
Hmm I think it might be related to this:
> # mdadm -E /dev/sdb1
> [...]
> Array Slot : 6 (0, failed, 2, 3, 1, 5, 4)
> Array State : uuuuUu 1 failed
One of the disks in this array was swapped, maybe this is what this info
records? How can I get rid of that?
--
Cheers
Michał (Saviq) Sawicz
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: 'Array state: ... 1 failed', but array clean?
2010-01-28 12:59 ` Michał Sawicz
@ 2010-01-29 9:44 ` Neil Brown
0 siblings, 0 replies; 3+ messages in thread
From: Neil Brown @ 2010-01-29 9:44 UTC (permalink / raw)
To: Michał Sawicz; +Cc: linux-raid
On Thu, 28 Jan 2010 13:59:39 +0100
Michał Sawicz <michal@sawicz.net> wrote:
> Dnia 2010-01-28, czw o godzinie 13:09 +0100, Michał Sawicz pisze:
> > Where does this 'failed' come from? Oh, and it's like that on all
> > members. Is my array safe as /proc/mdstat says?
>
> Hmm I think it might be related to this:
>
> > # mdadm -E /dev/sdb1
> > [...]
> > Array Slot : 6 (0, failed, 2, 3, 1, 5, 4)
> > Array State : uuuuUu 1 failed
>
> One of the disks in this array was swapped, maybe this is what this info
> records? How can I get rid of that?
>
The device that was the second device added to the array failed (or
disappeared), and this fact is recorded in case that device ever reappears...
Yes, this is confusing. mdadm-3.x report the array state differently.
NeilBrown
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2010-01-28 12:09 'Array state: ... 1 failed', but array clean? Michał Sawicz
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