Subject: Re: 3ware RAID controller slow?
To: Peter Eisch <>
From: Jukka Marin <>
List: netbsd-users
Date: 10/27/2007 17:46:33
On Sat, Oct 27, 2007 at 09:40:38AM -0500, Peter Eisch wrote:
> > Question: Why is RAID5 this slow?  Is it a NetBSD problem (in the twa driver,
> > for example) or is this how RAID5 performs?
> But I am running netbsd-3-1 with an MPBIOS kernel.  I can support I/O in
> excess of 30MB/s sustained. 

If I "dd if=/dev/zero of=foo bs=10m count=1000", I get over 140 MB/s write
speeds - but if I untar pkgsrc, performance collapses.  I would be pretty
happy with 140 MB/s, but below 1 MB/s is not acceptable for a server.  Not
even for my server. ;)