16 Jul
1998
16 Jul
'98
10:10 a.m.
Christian Fandt <cfandt(a)servtech.com> wrote:
Aha! Now I can connect QIC36/QIC02.... My HP 250 uses
DC600 type tape carts.
Don't be too sure of that. If it's a 9144 drive or one integrated in
a 79xx disc drive, it uses tapes that are mechanically the same but
with a completely different format called HCD that predates the QIC
formats and cannot be completely recorded in the field. THe format
involves full-width block markers that can't be recorded by the heads
in the drives.
Bob Niland used to post something about this over in comp.sys.hp.*
when someone popped the question. Go do a search in DejaNews for
author rjn(a)csn.net in comp.sys.hp.hardware looking for the keywords
QIC and HCD and you will probably turn it up.
-Frank McConnell
20 Jul
20 Jul
1:03 a.m.
At 15:10 16-07-98 -0700, Frank McConnell <fmc(a)reanimators.org> wrote:
Christian Fandt <cfandt(a)servtech.com> wrote:
> Aha! Now I can connect QIC36/QIC02.... My HP 250 uses DC600 type tape
carts.
Don't be too sure of that. If it's a 9144 drive or one integrated in
DC600 carts are the _physical_ media on which data is stored. I wasn't
saying DC600 is a format nor was QICxx a format HP uses (never knew what
protocol HP used 'til you mentioned HCD a bit later in yr msg.)
a 79xx disc drive, it uses tapes that are mechanically
the same but
with a completely different format called HCD that predates the QIC
formats and cannot be completely recorded in the field. THe format
involves full-width block markers that can't be recorded by the heads
in the drives.
Now I know what format the HP250 records its tapes under. Thanks for the
added tidbit of info to my very meager amount I have on the 250. :-) I
never got much of anything as far as technical tech data with the 250, just
the small OS/BASIC command reference handbook (which is very important just
to run the thing while lacking any other operations manuals.)
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA
Member of Antique Wireless Association
URL: http://www.ggw.org/freenet/a/awa/
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