From mboxrd@z Thu Jan  1 00:00:00 1970
From: seth vidal <skvidal@phy.duke.edu>
Subject: Re: Slow reconstruction
Date: Wed, 29 Jun 2005 13:32:58 -0400
Message-ID: <1120066378.10448.57.camel@cutter>
References: <1120061430.21458.236.camel@volt>
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To: John Rowe <rowe@excc.ex.ac.uk>
Cc: linux-raid@vger.kernel.org
List-Id: linux-raid.ids

On Wed, 2005-06-29 at 17:10 +0100, John Rowe wrote:
> First, thanks to all the authors of software RAID, which works really
> well. 
> 
> I have just one problem(!) and as disks get bigger it gets worse:
> reconstruction takes a long time. At the moment I've just had a disk
> fail on a 5x250 GB RAID5 array and it's going to take eight days to
> recover. Is there anything I can do to speed things up?
> 
> FWIW, each disk is the master drive on an IDE card, two of the disks are
> shared with the RAID1 root partition and one of the 5 devices is a RAID0
> stripe. The system isn't doing anything else, it's just used for backup.
> 

you know about /proc/sys/dev/raid/speed_limit_max and speed_limit_min,
right?

echo 40000 > /proc/sys/dev/raid/speed_limit_max

see if it goes faster, then.

-sv