> > > + * Modified by Reed Meyer <rdm@astro.yale.edu> to support the Toshiba
> > > + * SD-W1101 DVD-RAM (which doesn't like 6-byte commands). Changed the
> > > + * default I/O to 10-byte commands, with the minor side-effect that
> > > + * the driver doesn't use the slightly-faster(?) 6-byte commands
> >
> > The READ6 and WRITE6 commands are deprecated. The READ6 is still specified
> > as mandatory for block devices for compatibility with old initialisation
> > code. WRITE6 is specified as optionnal for block devices.
>
> If this is using IDE-SCSI then ATAPI only seems to support 10 byte
I don't have the ATAPI spec, but since there was no compatibility issue,
I will not be surprised if ATAPI specs got rid of READ6/WRITE6 commands.
> command format. You fix that in ide-scsi.c if so not by butchering the scsi
> layer. I had to add M/O disks to ide-scsi.c for this case as an example.
The group 1 READ10/WRITE10 commands were in the X3T9 draft (1985) for
direct access device. So, the removal of explicits READ6/WRITE6 from the
sr and sd drivers will be just fine surgery.
Obviously, the st driver still has to use READ6/WRITE6 commands.
Linux may well be the only O/S that still uses explicitely READ6/WRITE6
commands for direct access devices, in my opinion.
Gérard.
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