Subject: Re: CD-R[W] recommendations
To: None <nathanw@MIT.EDU>
From: Brad Spencer <brad@anduin.eldar.org>
List: netbsd-users
Date: 01/14/2000 18:19:40
   <smb@research.att.com> (Steven M. Bellovin) writes:

   > 
   > Does NetBSD support USB-connected CD-RW drives?
   > 

   We have some support for devices which comply to the USB Mass Storage
   spec, so in theory a USB CD-RW that followed that spec should work or
   be close to working.

It is true that we support the Mass Storage spec however, one must also
consider the class and the protocol supported.  We support the SCSI class
using Balk transfers.  There are a number of classes we do not support and
other protocols.  See /sys/dev/usb/umass.c for more information.

[Noting that the USUBCLASS_UFI, the USB floppy disk class would be nice to
have]

   In practice, the only USB CD-RW's I've seen used a proprietary
   ATAPI<->USB bridge chip, whose manufacturer (In-System Design,
   in-system.com) was uninterested in releasing programming information
   except under an NDA.

Ya, and that too....

	   - Nathan




Brad Spencer - brad@anduin.eldar.org   http://anduin.eldar.org
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