[dm-devel] Queuing of dm-raid1 resyncs to the same underlying block devices

[Brassow Jonathan]

I don’t believe it does.  dm-raid does use the same RAID kernel personalities as MD though, so I would think that it could be added.  I’ll check with Heinz and see if he knows.

 brassow

> On Sep 26, 2015, at 10:49 AM, Richard Davies <richard at arachsys.com> wrote:
> 
> Hi,
> 
> Does dm-raid queue resyncs of multiple dm-raid1 arrays, if the underlying
> block devices are the same?
> 
> Linux md has this feature, e.g.:
> 
> # cat /proc/mdstat
> Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
> md1 : active raid1 sda2[2] sdb2[1]
>      943202240 blocks [2/1] [_U]
>      [====>................]  recovery = 21.9% (207167744/943202240)
>      finish=20290.8min speed=603K/sec
>      bitmap: 1/8 pages [4KB], 65536KB chunk
> 
> md0 : active raid1 sda1[2] sdb1[1]
>      67108736 blocks [2/1] [_U]
>        resync=DELAYED
>      bitmap: 1/1 pages [4KB], 65536KB chunk
> 
> 
> After some time investigating, I can't find it in dm-raid.
> 
> Please can someone tell me if this is implemented or not?
> 
> If it is implemented, where should I look to see it happening?
> 
> Thanks,
> 
> Richard.
> 
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