Subject: Re: PD-Disk
To: None <port-i386@NetBSD.ORG>
From: Mark Brinicombe <firstname.lastname@example.org>
Date: 11/28/1995 17:39:42
Jeff Kreska (email@example.com) wrote
>Does any one know if PD Disk's are supported under NetBSD??
>The boot spits out some information about the device being an unknown type.
I use a PD drive on netbsd/arm32 a new port shortly joining the source tree.
The only problem I had was that the sd driver reported that it could not read
mode sense page 4 (rigid geometry) and was thus faking the geom.
The other problem I has was that it was failing to invalidate the disklabel
when I swapped discs as the drive does not appear to report a unit attention
when the media is changes and from what I can tell only a unit attention or not
ready message from the drive will invalidate the disklabel i.e. clear
I have made a couple of patches to sd to sort these probs out.
regarding the first problem, the SCSI2 specs say that mode sense page 4 is
reserved for optical memory devices so the sd driver should not really be
trying to read it for these devices.
Mark Brinicombe firstname.lastname@example.org
Research Associate http://www.ph.kcl.ac.uk/~amb/
Department of Physics tel: 0171 873 2894
King's College London fax: 0171 873 2716