[Info-vax] compressed SDLT capacity

[B Hobbs]

On Nov 23, 12:19 pm, koeh... at eisner.nospam.encompasserve.org (Bob
Koehler) wrote:
> In article <09bbf195-3cab-47c5-88e4-5d57e00d6... at u25g2000prh.googlegroups.com>, B Hobbs <bdhobb... at acm.org> writes:
>
> > With my VMS 7.1 treating the SDLT tape drive as a TK50, I suppose it
> > would depend on the SCSI commands that a TK50 drive could handle and
> > how the driver is programmed.  Anyone have a link to a TK50 manual
> > listing the SCSI commands?
>
>    A TK50 is not a SCSI device, there has to be a controller between
>    it and a SCSI bus, so it's a matter of what commands that controller
>    implements.

Yeah, sure.  Next you'll try to convince us that folk used wood and
plastic sticks for calculations before pocket computers and wrote
letters long hand before e-mail.  :-)

Hmmm, so my system maps TK50 commands to SCSI commands and maps SCSI
messages to TK50 messages.  Sounds painful but it appears to work
well.  Is there a TK50 technical reference on-line somewhere?

Thanks, Bob, for the info.