[ale] md2_raid1

[Matt Rideout]

What's the output of:

cat /proc/mdstat

drifter wrote:
> This FC11 Box has suddenly slowed  to a crawl.
>
> Top reports that md2_raid1 is sucking up 20 - 32%
> of the cpu cycles and md2_resync is taking another
> 2-5%.
>
> The log says this:
>
> Sarge kernel: md: data-check of RAID array md2
> Sarge kernel: md: minimum _guaranteed_  speed: 1000 KB/sec/disk.
> Sarge kernel: md: using maximum available idle IO bandwidth (but not more
>   than 200000 KB/sec) for data-check.
> Sarge kernel: md: using 128k window, over a total of 202001152 blocks.
> Sarge kernel: md: delaying data-check of md0 until md2 has finished (they
>   share one or more physical units)
> Sarge kernel: md: delaying data-check of md1 until md2 has finished (they
>   share one or more physical units)
>
> Is this routine, or an early hint that one of my hard drives may be about 
> to die?
>
> If routine, can I create a cron job that does this work at a more useful 
> time, such as 2 am?
>
> Sean
>
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