Re: RAID-5 build time calculation?

[Steve Lord]

On Wed, 2001-11-14 at 07:40, Roy Sigurd Karlsbakk wrote:
> hi all
> 
> I apologize if this is more of a support question, but I couldn't find it
> anywhere...
> 
> How long time may I have to wait for kernel to build a software RAID-5 on
> 12 18GB 15k SCSI drives? Algorithm is set to left-symmetric and persistent
> superblock is 1.
> 
> What can be done to speed this up_
> 
> thanks
> 

I have seen the raid resync get stuck at really slow rates, it seems to
start running faster if you echo a larger number into

/proc/sys/dev/raid/speed_limit_min

You can look at /proc/mdstat to see how the rebuild is progressing.

Steve