Kernel says there is not a valid superblock, but there is

[Phillip Susi]

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)
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[NeilBrown]

Which kernel?
uname -a
and may as well add
mdadm -V

as well.

NeilBrown

Post by Phillip Susi
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
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)
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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[Phillip Susi]

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