[sclug] RAID stuff again

[Matt]

* Matt <matt at bodgit-n-scarper.com> [2005-09-23 11:13:10]:
> * 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.

No, I think I've got this wrong.

I think there is a guaranteed *minimum* rebuild rate. Therefore fairly
sure it should go as fast as it can.

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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