Hi,
I used v3.3.1 mdadm to do some test for bitmap, but when switch bitmap from
internal to none, the output shows fail info about remove internal
bitmap, is it
just a warning? Since the bitmap seems to be cleared, and it doesn't
show with
v3.2.6 mdadm with the same steps.
linux:~ # mdadm --create md0 --raid-devices=2 --level=mirror
--assume-clean /dev/vdb /dev/vdc
mdadm: Note: this array has metadata at the start and
may not be suitable as a boot device. If you plan to
store '/boot' on this device please ensure that
your boot-loader understands md/v1.x metadata, or use
--metadata=0.90
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md/md0 started.
linux:~ # cat /proc/mdstat
Personalities : [raid1]
md127 : active raid1 vdc[1] vdb[0]
523712 blocks super 1.2 [2/2] [UU]
unused devices: <none>
linux:~ # mdadm --grow --bitmap=internal /dev/md127
linux:~ # cat /proc/mdstat
Personalities : [raid1]
md127 : active raid1 vdc[1] vdb[0]
523712 blocks super 1.2 [2/2] [UU]
bitmap: 1/1 pages [4KB], 65536KB chunk
unused devices: <none>
linux:~ # mdadm --grow --bitmap=none /dev/md127
mdadm: failed to remove internal bitmap.
linux:~ # cat /proc/mdstat
Personalities : [raid1]
md127 : active raid1 vdc[1] vdb[0]
523712 blocks super 1.2 [2/2] [UU]
unused devices: <none>
Thanks,
Gary
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