On 2/20/07, Neil Brown <neilb@xxxxxxx> wrote:
> It says that the device (md0) is in delta 4->5, but I'm unable to get
> it to restart reshaping. Are all the data I had on the raid-device
> lost? Or is it possible to make it restart where it left off? It
> clearly knows how far it has come along, since I get some stats about
> that.
Hmm... it should "just work", and it my testing it does.
What should "kick off" the rebuild/reshape-process once it has been
interrupted?
The reshape process regularly checkpoints its progress so it knows
where to start off from, and when you assemble the array again, it
should restart the reshape.
Ok, no matter if it's a different system assembling the drives? The
kernel is not running the md-device (if there is one?) from
mdadm-2.6-source, it's running the one inside 2.6.17.
Can you post kernel log messages showing md0 being assembled? Also
the output of "mdadm -E" on a couple of drives might be helpful.
Running assemble:
# ./mdadm --assemble --scan
mdadm: failed to RUN_ARRAY /dev/.static/dev/md0: Invalid argument
Ouput from syslog:
Feb 20 20:20:09 ubuntu kernel: [17197083.928000] md: md0 stopped.
Feb 20 20:20:09 ubuntu kernel: [17197084.012000] md: bind<sdd1>
Feb 20 20:20:09 ubuntu kernel: [17197084.012000] md: bind<sde1>
Feb 20 20:20:09 ubuntu kernel: [17197084.012000] md: bind<sdf1>
Feb 20 20:20:09 ubuntu kernel: [17197084.012000] md: bind<sdg1>
Feb 20 20:20:09 ubuntu kernel: [17197084.016000] md: bind<sdc1>
Details:
# ./mdadm --detail /dev/md0
/dev/md0:
Version : 00.91.03
Creation Time : Sun Feb 18 01:19:36 2007
Raid Level : raid5
Used Dev Size : 244195904 (232.88 GiB 250.06 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Sun Feb 18 14:18:48 2007
State : active, Not Started
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Delta Devices : 1, (4->5)
UUID : e100e921:53bc1ec5:0ff90348:cdad8788
Events : 0.71599
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
2 8 65 2 active sync /dev/sde1
3 8 81 3 active sync /dev/sdf1
4 8 97 4 active sync /dev/sdg1
# ./mdadm -E /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 00.91.03
UUID : e100e921:53bc1ec5:0ff90348:cdad8788
Creation Time : Sun Feb 18 01:19:36 2007
Raid Level : raid5
Used Dev Size : 244195904 (232.88 GiB 250.06 GB)
Array Size : 976783616 (931.53 GiB 1000.23 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 0
Reshape pos'n : 383536128 (365.77 GiB 392.74 GB)
Delta Devices : 1 (4->5)
Update Time : Sun Feb 18 14:18:48 2007
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Checksum : 8389d7b3 - correct
Events : 0.71599
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 33 0 active sync /dev/sdc1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 49 1 active sync /dev/sdd1
2 2 8 65 2 active sync /dev/sde1
3 3 8 81 3 active sync /dev/sdf1
4 4 8 129 4 active sync
root@ubuntu:/home/ubuntu/mdadm-2.6# ./mdadm -E /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 00.91.03
UUID : e100e921:53bc1ec5:0ff90348:cdad8788
Creation Time : Sun Feb 18 01:19:36 2007
Raid Level : raid5
Used Dev Size : 244195904 (232.88 GiB 250.06 GB)
Array Size : 976783616 (931.53 GiB 1000.23 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 0
Reshape pos'n : 383536128 (365.77 GiB 392.74 GB)
Delta Devices : 1 (4->5)
Update Time : Sun Feb 18 14:18:48 2007
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Checksum : 8389d7c5 - correct
Events : 0.71599
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 49 1 active sync /dev/sdd1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 49 1 active sync /dev/sdd1
2 2 8 65 2 active sync /dev/sde1
3 3 8 81 3 active sync /dev/sdf1
4 4 8 129 4 active sync
root@ubuntu:/home/ubuntu/mdadm-2.6# ./mdadm -E /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 00.91.03
UUID : e100e921:53bc1ec5:0ff90348:cdad8788
Creation Time : Sun Feb 18 01:19:36 2007
Raid Level : raid5
Used Dev Size : 244195904 (232.88 GiB 250.06 GB)
Array Size : 976783616 (931.53 GiB 1000.23 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 0
Reshape pos'n : 383536128 (365.77 GiB 392.74 GB)
Delta Devices : 1 (4->5)
Update Time : Sun Feb 18 14:18:48 2007
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Checksum : 8389d7d7 - correct
Events : 0.71599
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 65 2 active sync /dev/sde1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 49 1 active sync /dev/sdd1
2 2 8 65 2 active sync /dev/sde1
3 3 8 81 3 active sync /dev/sdf1
4 4 8 129 4 active sync
root@ubuntu:/home/ubuntu/mdadm-2.6# ./mdadm -E /dev/sdf1
/dev/sdf1:
Magic : a92b4efc
Version : 00.91.03
UUID : e100e921:53bc1ec5:0ff90348:cdad8788
Creation Time : Sun Feb 18 01:19:36 2007
Raid Level : raid5
Used Dev Size : 244195904 (232.88 GiB 250.06 GB)
Array Size : 976783616 (931.53 GiB 1000.23 GB)
Raid Devices : 5
Total Devices : 5
Preferred Minor : 0
Reshape pos'n : 383536128 (365.77 GiB 392.74 GB)
Delta Devices : 1 (4->5)
Update Time : Sun Feb 18 14:18:48 2007
State : clean
Active Devices : 5
Working Devices : 5
Failed Devices : 0
Spare Devices : 0
Checksum : 8389d7e9 - correct
Events : 0.71599
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 81 3 active sync /dev/sdf1
0 0 8 33 0 active sync /dev/sdc1
1 1 8 49 1 active sync /dev/sdd1
2 2 8 65 2 active sync /dev/sde1
3 3 8 81 3 active sync /dev/sdf1
4 4 8 129 4 active sync
If you have any more I need to run, please let me know and I'll run
the commands :)
--
Thomas
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