[comp.sys.ibm.pc.rt] mmdf-II on the PC/RT and cartridge tape compatibility

michael@cs.tcd.ie (Michael Nowlan) (01/06/89)

I am trying to find a way of getting the mmdf-II sources onto
an IBM PC/RT (IBM 6150 in Europe):

1) Is anybody already running mmdf on an RT and could I obtain
   a tape cartridge with mmdf from them ?

2) Can the RT cartridges be read/written on any other machine
   such as a SUN or a DATAMEDIA Uniplus system ?

Regards,
Michael.

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root@blender.UUCP (Super user) (01/09/89)

In article <30308@cs.tcd.ie>, michael@cs.tcd.ie (Michael Nowlan) writes:
> 2) Can the RT cartridges be read/written on any other machine
>    such as a SUN or a DATAMEDIA Uniplus system ?

Not sure if this is what you wanted to know, but our company uses RT's as
well as PS/2's running SCO and I've used tapes created on the RT using 
"tar" on the PS/2 with no problem.. Vice versa works well also.

stuart@io.UUCP (Stuart Freedman x3262) (01/11/89)

Michael - I tried mailing back to you, but it didn't work, so here is my
reply for the limited edification of the net...
---
I have successfully read a Sun tape on an RT cartridge drive.  Note that I
have only tested QIC-24 Sun tapes (made with /dev/rst8).  I suspect that
the old format (/dev/rst0) will not be compatible.  Good luck.

                        Stuart
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ehrlich@shire.cs.psu.edu (Dan Ehrlich) (01/11/89)

In article <890@io.UUCP>, stuart@io (Stuart Freedman x3262) writes:
>Michael - I tried mailing back to you, but it didn't work, so here is my
>reply for the limited edification of the net...
>---
>I have successfully read a Sun tape on an RT cartridge drive.  Note that I
>have only tested QIC-24 Sun tapes (made with /dev/rst8).  I suspect that
>the old format (/dev/rst0) will not be compatible.  Good luck.
>
>                        Stuart

Just a note of warning.  IBM has started selling a new model streaming tape
drive that will read QIC-24 tapes but writes tapes at a density that Suns,
and any other catridge drive I have access to, won't read.  I think it is
named the 6157 Model 2.  Another good move on IBM's part.
-- 
Dan Ehrlich <ehrlich@shire.cs.psu.edu> | Disclaimer: The opinions expressed are
The Pennsylvania State University      | my own, and should not be attributed
Department of Computer Science         | to anyone else, living or dead.
University Park, PA   16802            |

usenet@cps3xx.UUCP (Usenet file owner) (01/12/89)

in article <4203@psuvax1.cs.psu.edu>, ehrlich@shire.cs.psu.edu (Dan Ehrlich) says:
> Just a note of warning.  IBM has started selling a new model streaming tape
> drive that will read QIC-24 tapes but writes tapes at a density that Suns,
> and any other catridge drive I have access to, won't read.  I think it is
> named the 6157 Model 2.  Another good move on IBM's part.

The 6157 Model 2 can get about three times the amount of data on a
cartridge tape as opposed to the 6157 model 1. That is very useful to
those of use with 120 MB disk partitions to do an unattended level 0
backup at 4am so that we don't have to disturb everyone else's work.
The new drive also reads and writes two to three times faster than the
previous model. As the 6157-002 uses the same controller card as the
6157, in those rare instances that we need to write a low density tape,
we just plug a 6157 into the back of our machine. The 6157-002 was a
good move and not a bad move.

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"My other computer is an IBM RT Model 135"

schwartz@shire.cs.psu.edu (Scott Schwartz) (01/12/89)

In article <1495@cps3xx.UUCP>, usenet@cps3xx (Usenet file owner) writes:
>ehrlich@shire.cs.psu.edu (Dan Ehrlich) says:
>> Just a note of warning.  IBM has started selling a new model streaming tape
>> drive that will read QIC-24 tapes but writes tapes at a density that Suns,
>> and any other catridge drive I have access to, won't read.  I think it is
>> named the 6157 Model 2.  Another good move on IBM's part.

>The 6157 Model 2 can get about three times the amount of data on a
>cartridge tape as opposed to the 6157 model 1. That is very useful...

>As the 6157-002 uses the same controller card as the
>6157, in those rare instances that we need to write a low density tape,
>we just plug a 6157 into the back of our machine. The 6157-002 was a
>good move and not a bad move.

Get a grip!  How about if IBM just produced a tape unit that was
COMPATABLE with the REST OF THE WORLD?  Or did both?  How about if you
drop by our lab once a week so we can plug your 6157 in when we need
to write standard tapes?

IBM: "Oh yes, we run OPEN SYSTEMS, we are STANDARD!"
PSU: "Ok, then why can't our Suns read your tapes?"
IBM: "Suns?  You have to buy ALL IBM equippment, of course!"
PSU: "Riiiight..."
-- 
Scott Schwartz		<schwartz@shire.cs.psu.edu>

root@blender.UUCP (Super user) (01/14/89)

In article <4206@psuvax1.cs.psu.edu>, schwartz@shire.cs.psu.edu (Scott Schwartz) writes:
> Get a grip!  How about if IBM just produced a tape unit that was
> COMPATABLE with the REST OF THE WORLD?  Or did both?  How about if you
> drop by our lab once a week so we can plug your 6157 in when we need
> to write standard tapes?

That's right.  In fact, when IBM discontinued the model 001 and began replacing
our clients' drives with the new model 002 we complained in big time fashion. 
"Our clients actually enjoyed backing up 140 megs of data EVERY night on three
 60 meg tapes spending many enjoyable hours attending to the operation. Now
 they just set it up and go home. How can you do this to us and them???"

IBM just laughed at us. I just can't believe why any company would want to 
improve their technology and equipment without waiting for the rest of the
industry to catch up.

[NAUSEATING SARCASM OFF]
-- 
---
herb@blender.UUCP

"Did I tell you I'm forgetful?"