* Kernel says there is not a valid superblock, but there is
@ 2014-10-20 15:09 Phillip Susi
2014-10-20 21:09 ` NeilBrown
0 siblings, 1 reply; 3+ messages in thread
From: Phillip Susi @ 2014-10-20 15:09 UTC (permalink / raw)
To: Linux RAID
When trying to assemble, the kernel complains:
md: md1 stopped.
md: sda2 does not have a valid v1.2 superblock, not importing!
md: md_import_device returned -22
md: sdb2 does not have a valid v1.2 superblock, not importing!
md: md_import_device returned -22
Yet the superblock looks perfectly fine according to mdadm -E:
/dev/sda2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 34e89993:37821273:5498dc63:07233b2c
Name : devserv2:1
Creation Time : Mon Jun 16 11:24:00 2014
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3900907520 (1860.10 GiB 1997.26 GB)
Array Size : 158334976 (151.00 GiB 162.14 GB)
Used Dev Size : 316669952 (151.00 GiB 162.14 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 40c38a87:88807f78:5bf71f34:4c9b2215
Update Time : Mon Oct 20 09:56:25 2014
Checksum : d2369656 - correct
Events : 303
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing)
/dev/sdb2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 34e89993:37821273:5498dc63:07233b2c
Name : devserv2:1
Creation Time : Mon Jun 16 11:24:00 2014
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3900907520 (1860.10 GiB 1997.26 GB)
Array Size : 158334976 (151.00 GiB 162.14 GB)
Used Dev Size : 316669952 (151.00 GiB 162.14 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 0fb85e8f:e697a9a0:7bd6eac4:03b8851d
Update Time : Mon Oct 20 10:08:35 2014
Checksum : 9b63a13c - correct
Events : 311
Device Role : Active device 1
Array State : .A ('A' == active, '.' == missing)
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Kernel says there is not a valid superblock, but there is
2014-10-20 15:09 Kernel says there is not a valid superblock, but there is Phillip Susi
@ 2014-10-20 21:09 ` NeilBrown
2014-10-21 14:07 ` Phillip Susi
0 siblings, 1 reply; 3+ messages in thread
From: NeilBrown @ 2014-10-20 21:09 UTC (permalink / raw)
To: Phillip Susi; +Cc: Linux RAID
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On Mon, 20 Oct 2014 11:09:59 -0400 Phillip Susi <phillsusi@gmail.com> wrote:
> When trying to assemble, the kernel complains:
Which kernel?
uname -a
and may as well add
mdadm -V
as well.
NeilBrown
>
> md: md1 stopped.
> md: sda2 does not have a valid v1.2 superblock, not importing!
> md: md_import_device returned -22
> md: sdb2 does not have a valid v1.2 superblock, not importing!
> md: md_import_device returned -22
>
> Yet the superblock looks perfectly fine according to mdadm -E:
>
> /dev/sda2:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 34e89993:37821273:5498dc63:07233b2c
> Name : devserv2:1
> Creation Time : Mon Jun 16 11:24:00 2014
> Raid Level : raid1
> Raid Devices : 2
>
> Avail Dev Size : 3900907520 (1860.10 GiB 1997.26 GB)
> Array Size : 158334976 (151.00 GiB 162.14 GB)
> Used Dev Size : 316669952 (151.00 GiB 162.14 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 40c38a87:88807f78:5bf71f34:4c9b2215
>
> Update Time : Mon Oct 20 09:56:25 2014
> Checksum : d2369656 - correct
> Events : 303
>
>
> Device Role : Active device 0
> Array State : AA ('A' == active, '.' == missing)
>
> /dev/sdb2:
> Magic : a92b4efc
> Version : 1.2
> Feature Map : 0x0
> Array UUID : 34e89993:37821273:5498dc63:07233b2c
> Name : devserv2:1
> Creation Time : Mon Jun 16 11:24:00 2014
> Raid Level : raid1
> Raid Devices : 2
>
> Avail Dev Size : 3900907520 (1860.10 GiB 1997.26 GB)
> Array Size : 158334976 (151.00 GiB 162.14 GB)
> Used Dev Size : 316669952 (151.00 GiB 162.14 GB)
> Data Offset : 262144 sectors
> Super Offset : 8 sectors
> State : clean
> Device UUID : 0fb85e8f:e697a9a0:7bd6eac4:03b8851d
>
> Update Time : Mon Oct 20 10:08:35 2014
> Checksum : 9b63a13c - correct
> Events : 311
>
>
> Device Role : Active device 1
> Array State : .A ('A' == active, '.' == missing)
> --
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: Kernel says there is not a valid superblock, but there is
2014-10-20 21:09 ` NeilBrown
@ 2014-10-21 14:07 ` Phillip Susi
0 siblings, 0 replies; 3+ messages in thread
From: Phillip Susi @ 2014-10-21 14:07 UTC (permalink / raw)
To: NeilBrown; +Cc: Linux RAID
On 10/20/2014 5:09 PM, NeilBrown wrote:
> On Mon, 20 Oct 2014 11:09:59 -0400 Phillip Susi <phillsusi@gmail.com> wrote:
>
>> When trying to assemble, the kernel complains:
>
> Which kernel?
> uname -a
> and may as well add
> mdadm -V
>
> as well.
uname -a
Linux hyper1 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
mdadm -V
mdadm - v3.2.5 - 18th May 2012
I managed to hack around with dmsetup to create a linear mapping to the
correct data offset that mdadm -E listed and recover my data and blow
away and recreate the array. I saved a dump of the superblock if you
want them for debugging.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-10-20 21:09 ` NeilBrown
2014-10-21 14:07 ` Phillip Susi
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