[NCLUG] sw raid, recovery after install

[Stephen Warren]

On 01/02/2013 02:35 PM, Matt Rosing wrote:
> Hi,
> 
> I added a raid 5 to my computer with 3 identical drives. I mounted it. I 
> moved files to it. It looks like it's working. Then I looked at 
> /proc/mdstat and it says it's recovering:
> 
> -------------
> root at phoenix:/var/log# cat /proc/mdstat
> Personalities : [raid6] [raid5] [raid4]
> md0 : active raid5 sdb[0] sdd[3] sdc[1]
>        2930274304 blocks super 1.2 level 5, 512k chunk, algorithm 2 
> [3/2] [UU_]
>        [========>............]  recovery = 40.6% (595347620/1465137152) 
> finish=235.8min speed=61467K/sec
> 
> unused devices: <none>
> -----------
> 
> Is it normal to be recovering a disk right after the raid is created? It 
> could very well be that I set it up incorrectly.

Yes, it's normal - it's building the initial version of the checksum
data on the third drive.