Subject: Re: Bad performance, biowait on raid device
To: Stefan Wurstbauer <email@example.com>
From: Thor Lancelot Simon <firstname.lastname@example.org>
Date: 03/14/2006 17:28:41
On Tue, Mar 14, 2006 at 06:09:51PM +0100, Stefan Wurstbauer wrote:
> Hi all,
> I'm running NetBSD 3.0 on a Dell PowerEdge 4600 server. The disks are
> 4 scsi disks / raid 5 on a hardware raid controller, mounted as a ffs
> filesystem (without softdeps).
> When I, for example, extract pkgsrc.tgz I take ages to complete.
*What* disks? *What* "hardware RAID controller"?
A lot of hardware RAID controllers are really quite awful, especially
for small, synchronous writes (which is what you'll get, with FFS