Re: resync duration ?

[Bill Davidsen <davidsen@tmr.com>]

Rainer Fuegenstein wrote:
> Hi guys,
>
> I'm a but confused about the duration of a raid5 resync:
>
> - occasionally, my server with 4*750 gb sata raid5 crashed (because of
> problems with the power supply); after rebooting it took about 10 to 12
> hours to resync the raid5 (guess it just re-created some parity
> information or however it works internally, but didn't have to copy
> any data)
>
>   
I have a test machine which crashes regularly (used for kernel and 
hardware tests), and that sounds long. Are you running without a bitmap, 
by any chance?

> - right now I replaced one 750GB disk with a 1.5TB disk, but now
> resyncing (according to /proc/mdstat) it is supposed to take only 160
> minutes ?! although it needs top copy data to a blank disk ?
>
> is this normal or should I be worried, especially before I pull out
> the next 750GB disk and replace it with the next 1.5TB disk ?
>
> tnx in advance.
>
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-- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc

"You are disgraced professional losers. And by the way, give us our money back."
    - Representative Earl Pomeroy,  Democrat of North Dakota
on the A.I.G. executives who were paid bonuses  after a federal bailout.