Subject: Re: Disks with 128 or 256 bytes per sector
To: Jochen Kunz <>
From: Manuel Bouyer <>
List: tech-kern
Date: 05/29/2001 19:13:50
On Tue, May 29, 2001 at 01:52:35PM +0200, Jochen Kunz wrote:
> Hi.
> I am currently in the beginning of writing a device driver for the 
> DEC RX01 / RX02 floppy disk system. These drives use 128 or 256 bytes
> per sctor. How does NetBSD deal with this? Is there a system to use non
> 512 byte per sector disks, or should my driver do a transparent sector
> mapping to 512 byte sectors. (Like the firmware of SCSI CDROM drives in 
> 512 byte per sector mode.) A first look at disk(9) did not gave me
> a hint. 

As far as I know, We're limited to 512 bytes/sector for now.
Solutions have been provided in kern/3790, 3791 and 3792; but unfortunably
nobody looked at this until now :(

Manuel Bouyer, LIP6, Universite Paris VI.