Weedy
2014-10-13 02:03:40 UTC
My server rebooted for some reason. Possibly disk/cable related.
The superblocks on my raid0s now think they are raid4s. Can I reverse this?
# mdadm --assemble -v -f --config=/etc/mdadm.conf /dev/md1 /dev/sd[ab]2
mdadm: looking for devices for /dev/md1
mdadm: /dev/sda2 has wrong raid level.
mdadm: /dev/sdb2 has wrong raid level.
# mdadm --examine -v /dev/sda2
/dev/sda2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : de492a9a:c62a01a3:eb511bbd:ead87a3a
Name : alice:1 (local to host alice)
Creation Time : Tue Jul 31 00:25:03 2012
Raid Level : raid4
Raid Devices : 3
Avail Dev Size : 20240876 (9.65 GiB 10.36 GB)
Array Size : 20239360 (19.30 GiB 20.73 GB)
Used Dev Size : 20239360 (9.65 GiB 10.36 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=492 sectors
State : active
Device UUID : 436eeacc:5abe6b33:8c9f1de1:9031c001
Update Time : Sat Apr 26 23:56:01 2014
Checksum : c9dfcb49 - correct
Events : 43295
Chunk Size : 32K
Device Role : Active device 0
Array State : AA. ('A' == active, '.' == missing, 'R' == replacing)
# mdadm --examine -v /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : de492a9a:c62a01a3:eb511bbd:ead87a3a
Name : alice:1 (local to host alice)
Creation Time : Tue Jul 31 00:25:03 2012
Raid Level : raid4
Raid Devices : 3
Avail Dev Size : 20240876 (9.65 GiB 10.36 GB)
Array Size : 20239360 (19.30 GiB 20.73 GB)
Used Dev Size : 20239360 (9.65 GiB 10.36 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=492 sectors
State : active
Device UUID : 6a01ee1d:312826ad:4be6e47a:60d5b684
Update Time : Sat Apr 26 23:56:01 2014
Checksum : b15bb2d7 - correct
Events : 43295
Chunk Size : 32K
Device Role : Active device 1
Array State : AA. ('A' == active, '.' == missing, 'R' == replacing)
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The superblocks on my raid0s now think they are raid4s. Can I reverse this?
# mdadm --assemble -v -f --config=/etc/mdadm.conf /dev/md1 /dev/sd[ab]2
mdadm: looking for devices for /dev/md1
mdadm: /dev/sda2 has wrong raid level.
mdadm: /dev/sdb2 has wrong raid level.
# mdadm --examine -v /dev/sda2
/dev/sda2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : de492a9a:c62a01a3:eb511bbd:ead87a3a
Name : alice:1 (local to host alice)
Creation Time : Tue Jul 31 00:25:03 2012
Raid Level : raid4
Raid Devices : 3
Avail Dev Size : 20240876 (9.65 GiB 10.36 GB)
Array Size : 20239360 (19.30 GiB 20.73 GB)
Used Dev Size : 20239360 (9.65 GiB 10.36 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=492 sectors
State : active
Device UUID : 436eeacc:5abe6b33:8c9f1de1:9031c001
Update Time : Sat Apr 26 23:56:01 2014
Checksum : c9dfcb49 - correct
Events : 43295
Chunk Size : 32K
Device Role : Active device 0
Array State : AA. ('A' == active, '.' == missing, 'R' == replacing)
# mdadm --examine -v /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : de492a9a:c62a01a3:eb511bbd:ead87a3a
Name : alice:1 (local to host alice)
Creation Time : Tue Jul 31 00:25:03 2012
Raid Level : raid4
Raid Devices : 3
Avail Dev Size : 20240876 (9.65 GiB 10.36 GB)
Array Size : 20239360 (19.30 GiB 20.73 GB)
Used Dev Size : 20239360 (9.65 GiB 10.36 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=492 sectors
State : active
Device UUID : 6a01ee1d:312826ad:4be6e47a:60d5b684
Update Time : Sat Apr 26 23:56:01 2014
Checksum : b15bb2d7 - correct
Events : 43295
Chunk Size : 32K
Device Role : Active device 1
Array State : AA. ('A' == active, '.' == missing, 'R' == replacing)
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