[sclug] RAID stuff again

[Matt]

* Peter Brewer <p.w.brewer at reading.ac.uk> [2005-09-23 11:05:57]:
> At the risk of boring everyone shitless with my infamous RAID - can 
> anyone tell me if my raid sync is unusually slow:
> 
> md2 : active raid5 dm-15[7] dm-14[6] dm-13[5] dm-12[4] dm-11[3] dm-10[2] 
> dm-9[1] dm-8[0]
>      1172101632 blocks level 5, 64k chunk, algorithm 2 [7/7] [UUUUUUU]
>      [=======>.............]  resync = 36.9% (72197384/195350272) 
> finish=1969.9min speed=1040K/sec
> 
> Am I falling victim to being a complete cheap scab re. controller and/or 
> disks?  Why on earth would it take the best part of 48 hours to sync a 
> 1.2Tb partition?

It deliberately doesn't munch all of your disc I/O when it does this,
when you started the rebuild, there was probably a kernel or syslog
message stating the maximum speed it will rebuild at.

You should be able to change the rate, but I don't remember how as I've
never needed to.

Matt
-- 
"I know it's your T1 because our network guy teleported into the Baywatch
hub and checked it!"
"It's 'telnet' and 'Bay Networks'."
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