Re: poor raidframe performance while setting it up

[Bernd Ernesti <netbsd%lists.veego.de@localhost>]

On Sun, Jun 07, 2009 at 04:18:19PM -0400, Thor Lancelot Simon wrote:
> On Sun, Jun 07, 2009 at 09:12:18PM +0200, Bernd Ernesti wrote:
> > Hi,
> > 
> > I'm trying to setup a raid 1 set with two drives and it takes a very
> > long time (at least raidframe is telling me that it will take a long
> > time) to initialize that raid set.
> > 
> > First it seems to be fast with 75MB/s i/o on both drives and then it
> > slows down very dramatically to 2.5MB/s, so the initail would take 100
> > till 200 hours for this 1TB raid set. With 75MB/s it would have taken
> > 3-4 hours.
> > The slow down happens after a few seonds till 2-3 minutes.
> 
> I have seen this too.  Fortunately it only seems to impact performance
> during initialization, and suddenly gets better part way through...

Hmm, the performance is back to normal 30 minutes after I started the
'raidctl -i'

Bernd