Hello,
I upgraded mdadm to 4.2 to get the bitmap support in IMSM.
I run: "mdadm --update-subarray=0 -U bitmap /dev/md127"
However the array details stay the same, with "Consistency Policy : resync".
No error is reported, and nothing in dmesg.
How to actually use it?
Thanks
# mdadm --detail /dev/md127
/dev/md127:
Version : imsm
Raid Level : container
Total Devices : 4
Working Devices : 4
UUID : d07837ca:804cf5e3:01c52352:f64b0524
Member Arrays : /dev/md/Volume0
Number Major Minor RaidDevice
- 8 32 - /dev/sdc
- 8 0 - /dev/sda
- 8 48 - /dev/sdd
- 8 16 - /dev/sdb
# mdadm --detail /dev/md126
/dev/md126:
Container : /dev/md/imsm0, member 0
Raid Level : raid10
Array Size : 1953519616 (1863.02 GiB 2000.40 GB)
Used Dev Size : 976759808 (931.51 GiB 1000.20 GB)
Raid Devices : 4
Total Devices : 4
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Layout : near=2
Chunk Size : 64K
Consistency Policy : resync
UUID : xxx
Number Major Minor RaidDevice State
3 8 0 0 active sync set-A /dev/sda
2 8 16 1 active sync set-B /dev/sdb
1 8 32 2 active sync set-A /dev/sdc
0 8 48 3 active sync set-B /dev/sdd
# mdadm --update-subarray=0 -U bitmap /dev/md127
# mdadm --detail /dev/md127
/dev/md127:
Version : imsm
Raid Level : container
Total Devices : 4
Working Devices : 4
UUID : d07837ca:804cf5e3:01c52352:f64b0524
Member Arrays : /dev/md/Volume0
Number Major Minor RaidDevice
- 8 32 - /dev/sdc
- 8 0 - /dev/sda
- 8 48 - /dev/sdd
- 8 16 - /dev/sdb
# mdadm --detail /dev/md126
/dev/md126:
Container : /dev/md/imsm0, member 0
Raid Level : raid10
Array Size : 1953519616 (1863.02 GiB 2000.40 GB)
Used Dev Size : 976759808 (931.51 GiB 1000.20 GB)
Raid Devices : 4
Total Devices : 4
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Layout : near=2
Chunk Size : 64K
Consistency Policy : resync
UUID : xxx
Number Major Minor RaidDevice State
3 8 0 0 active sync set-A /dev/sda
2 8 16 1 active sync set-B /dev/sdb
1 8 32 2 active sync set-A /dev/sdc
0 8 48 3 active sync set-B /dev/sdd
--
With respect,
Roman
