Subject: Re: disks write-back cache
To: Manuel Bouyer <>
From: Jason Thorpe <>
List: tech-kern
Date: 04/28/2003 14:42:43
On Monday, April 28, 2003, at 02:02  PM, Manuel Bouyer wrote:

> the "queue algorithm modifier" bits of the control mode page, maybe ?
> SPC-3 says that the default value should be "restricted reordering", 
> which
> really means no reordering.
> I should try changing this, to see if it improve performances.
> For a large sequential write, I'm not sure it would make much 
> difference.

It certainly could make a difference!  If you have a large sequential 
write, it could allow the disk to do a much larger internal write 
operation (merging the writes in its own buffer).

        -- Jason R. Thorpe <>