>>> John Robinson <john.robinson@xxxxxxxxxxxxxxxx> schrieb am 11.05.2011 um 19:00
in Nachricht <4DCAC0B3.8010509@xxxxxxxxxxxxxxxx>:
> On 11/05/2011 15:38, Ulrich Windl wrote:
> > Hi!
> >
> > I could reduce the problem to "--bitmap internal": It works if I leave it
> out. Unfortunately the RAID will fully resync every assembly when there was
> an unclean shutdown.
> > The thing that kept one device busy was MD-RAID itself: "mdadm -- stop"
> released the device.
> >
> > So to summarize:
> > 1) mdadm fails to set up an internal bitmap
> > 2) Even when mdadm fails to do 1), it starts the array
>
> OK. First up, the syntax is "--bitmap=internal" - perhaps you have a
> mdadm which is partially parsing what you've said but not got it 100%
> right. If using the correct syntax doesn't work, instead try creating
> the array without the bitmap, then adding one with
> mdadm --grow /dev/mdX --bitmap=internal
Hi John!
Thanks for that. Of course (using my syntax) the "--grow" variant also did not work. I would also expect that mdadm can either handle "--bitmap internal" as a variant of "--bitmap=internal" or emit a syntax error. Unfortunately I don't have the time right now to inspect the sources.
Regards,
Ulrich
P.S. Amazing things happen now and then:
# cat /proc/mdstat
Personalities : [linear] [raid1]
md2 : active raid1 dm-17[1] dm-10[0]
209715136 blocks [2/2] [UU]
md1 : active raid1 dm-12[0] dm-14[1]
20971456 blocks [2/2] [UU]
md3 : active raid1 dm-16[0] dm-9[1]
31457216 blocks [2/2] [UU]
md0 : active raid1 dm-11[0] dm-8[1]
525336512 blocks [2/2] [UU]
unused devices: <none>
# mdadm --grow --bitmap=internal /dev/md0
# mdadm --grow --bitmap internal /dev/md1
# mdadm --grow --bitmap internal /dev/md2
# mdadm --grow --bitmap=internal /dev/md3
mdadm: failed to set internal bitmap.
# cat /proc/mdstat
Personalities : [linear] [raid1]
md2 : active raid1 dm-17[1] dm-10[0]
209715136 blocks [2/2] [UU]
bitmap: 0/200 pages [0KB], 512KB chunk
md1 : active raid1 dm-12[0] dm-14[1]
20971456 blocks [2/2] [UU]
bitmap: 0/160 pages [0KB], 64KB chunk
md3 : active raid1 dm-16[0] dm-9[1]
31457216 blocks [2/2] [UU]
md0 : active raid1 dm-11[0] dm-8[1]
525336512 blocks [2/2] [UU]
bitmap: 0/126 pages [0KB], 2048KB chunk
unused devices: <none>
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