Re: Raid5 reshape

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On Saturday June 17, nigel@xxxxxxxxxxxxxx wrote:
> 
> Any ideas what I should do next? Thanks
> 

Looks like you've probably hit a bug.  I'll need a bit more info
though.

First:

> [root@homepc ~]# cat /proc/mdstat
> Personalities : [raid5] [raid4]
> md0 : active raid5 sdb1[1] sda1[0] hdc1[4](S) hdb1[2]
>       490223104 blocks super 0.91 level 5, 128k chunk, algorithm 2 [4/3] 
> [UUU_]
>       [=>...................]  reshape =  6.9% (17073280/245111552) 
> finish=86.3min speed=44003K/sec
> 
> unused devices: <none>

This really makes it look like the reshape is progressing.  How
long after the reboot was this taken?  How long after hdc1 has hot
added (roughly)?  What does it show now?

What happens if you remove hdc1 again?  Does the reshape keep going?

What I would expect to happen in this case is that the array reshapes
into a degraded array, then the missing disk is recovered onto hdc1.

NeilBrown
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