Re: poor raidframe performance while setting it up

[Thor Lancelot Simon <tls%rek.tjls.com@localhost>]

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...

Thor