Subject: Re: comparing raid-like filesystems
To: Pavel Cahyna <>
From: Manuel Bouyer <>
List: current-users
Date: 02/01/2003 23:22:13
On Sat, Feb 01, 2003 at 07:54:27PM +0100, Pavel Cahyna wrote:
> > 
> > Right, this is a deficiency in how we handle layered disk I/O.  Right
> > now we are limited to MAXPHYS (64k) for each "disk".  If this "disk"
> Why this limit? Is this a heritage from PDP-11 with its (i think) 64kB address
> space?

Some popular disk standart (IDE comes to mind, there may be others) don't
support transfers > 64k.

Manuel Bouyer <>
     NetBSD: 24 ans d'experience feront toujours la difference