[Info-vax] rx2600s on eBay

[vaxinf at chemie.uni-konstanz.de]

On 24 Mrz., 21:36, glen herrmannsfeldt <g... at ugcs.caltech.edu> wrote:
> Rich Jordan <jor... at ccs4vms.com> wrote:
> > I wonder if you could use a recent IDE model with an ACARD IDE bridge
> > to do the job.   I have a Yamaha "SCSI" CDRW (the F1 model) that is an
> > IDE drive with a Yamaha supplied SCSI bridge board in my PWS-600au
> > that has worked fine, so maybe its a feasible solution for DVD writing
> > as well.
>
> It is my understanding (man cdrecord on linux) that IDE CD/DVD
> writers use SCSI commands over the IDE bus.  That would
> suggest that the conversion should be easy to do.
>
> > If you search fleabay for SCSI DVD* there are a number of less
> > expensive DVD readers listed; as long as the Itanic is able to boot
> > DVD media on the SCSI bus thats probably the cheapest solution.
>
> -- glen

It's impossible to boot from a SCSI-DVD or SCSI-Acard-IDE-DVD
because the drive only understands 2048 block commands whereas
VMS wants 512 Byte blocks per I/O.

The IDE/S-ATA based DVD-drives use 2048 bytes per I/O, too.
But the VMS DQdriver does the mapping for you.

I would recommend to use a USB-IDE/S-ATA converter
that are bootable from EFI.

Hope this helps
Eberhard