Subject: Re: block- vs raw disk performance
To: Martijn van Buul <martijnb@atlas.ipv6.stack.nl>
From: Thor Lancelot Simon <tls@rek.tjls.com>
List: netbsd-users
Date: 04/12/2005 15:27:07
On Tue, Apr 12, 2005 at 06:58:50PM +0000, Martijn van Buul wrote:
> 
> How come sd0d is so slow sometimes?

When you dd to and from the block device node, every I/O forces allocation
in the metadata cache.  Why would you expect that to be a good thing?

-- 
 Thor Lancelot Simon	                                      tls@rek.tjls.com

"The inconsistency is startling, though admittedly, if consistency is to be
 abandoned or transcended, there is no problem."		- Noam Chomsky