| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3487.1 | Call closed... | AMCUCS::SWIERKOWSKI | Quot homines tot sententiae | Mon Apr 14 1997 21:28 | 26 |
| Greetings!
Took another guess at the external extension (its really 5xxxx, not xxxx)
using their voicemail system and Harold really wants to be able to do fast
(i.e. random-acess, directory-structured I/O) to a tape drive. He didn't
understand that he has no choice but to serially walk his way through the
saveset at tape speed. I suggested that if this is a saveset he references
regularly, he might consider copying the whole thing to a disk and using
/SAVE_SET when referencing the saveset on disk to pull individual files out.
Call closed...
Tony Swierkowski
Digital Equipment Corporation
Software Partner Engineering
Palo Alto, California
(415) 617-3601
"[email protected]"
P.S. Trivial pursuit time:
FWIW, DEC (not Digital back then) did make a "random-access" tape or
two in the past - any old-timers out there remember the last one that
was deployed in any volume? (Hint: Think console load media on a ???)
Extra points if you can name the "random-access" tape used on two
previous architecture platforms (one of which was seen in "Three Days
of the Condor")...
|
| 3487.2 | | HYDRA::NEWMAN | Chuck Newman, 508/467-5499 (DTN 297), MRO1-3/F26 | Tue Apr 15 1997 10:37 | 4 |
| One must have been an 11/750, right? I know the 11/780's used an RX02. I can't
remember what was on the 11/730 -- never actually used one of 'em.
-- Chuck Newman
|
| 3487.3 | You're thinking of the TU58... | AMCUCS::SWIERKOWSKI | Quot homines tot sententiae | Tue Apr 15 1997 14:26 | 28 |
| Greetings!
>One must have been an 11/750, right? I know the 11/780's used an RX02. I can't
>remember what was on the 11/730 -- never actually used one of 'em.
Good guess! The device was the TU58 and was the console media used on the
2'nd implementation of the VAX archicture (the VAX 11/750 a.k.a. "COMET").
The VAX 11/730 (a.k.a. the "NEBULA") also used the TU58 and of course was the
3'rd implementation of the VAX architecture. The first implementation of the
VAX archicture (the VAX 11/780 a.k.a. "STAR") used an RX02 connected to a
standalone LSI-11 as an independant console subsystem. If memory serves, since
the first VAX was codenamed "STAR", the first operating system (i.e. VAX/VMS)
was codenamed "STARLET" - references to which abound in the operating system
to this day...
The two previous architectures (PDP-11 and PDP-8) both had implementations
that made use of a funny little reel-to-reel drive commonly referred to as the
"DECtape" for small, reasonbly fast, cheap storage. I suspect that by today's
standards both of these "random-access" tape drives probably didn't have the
storage capacity of a digital wristwatch today...
Tony Swierkowski
================================================================================
> "640K ought to be enough for anybody."
> -- Bill Gates, 1981
================================================================================
|
| 3487.4 | | HYDRA::SCHAFER | Mark Schafer, SPE MRO | Tue Apr 15 1997 15:55 | 3 |
| common guys, get your brain in gear. STAR used an RX01, not the RX02.
Mark :-)
|
| 3487.5 | Call closed... | AMCUCS::SWIERKOWSKI | Quot homines tot sententiae | Fri Apr 18 1997 12:56 | 13 |
| Greetings!
Mark's right, but later 11/780's really did use RX02's, but strapped for
"single" density to emulate RX01's if memory serves, call closed too BTW...
Tony Swierkowski
Digital Equipment Corporation
Software Partner Engineering
Palo Alto, California
(415) 617-3601
"[email protected]"
|