rct12

khaw@pplace.COM (Mike Khaw) (06/06/89)

Domain_OS 10.1, DN4500, bsd environment.

I just made a tar tape using:

	tar cf /dev/rct12 .
	cd somewhere else
	tar cf /dev/rct12

(rct12 is the non-rewinding 1/4" cart. tape drive device file).

The machine that I made the tape on can't read the 2nd tar archive
(it says something about /dev/rct12 being non-existent) using either
tar or dd.

I can read the tape on a Sun using /dev/nrst8 (QIC-24 format, nonrewinding).

Seems to me tar is (still) broken on Apollos.  Is there a patch to fix
this problem?

Mike Khaw
ParcPlace Systems, 1550 Plymouth St., Mountain View, CA 94043	415/691-6749
Domain=khaw@parcplace.com, UUCP={uunet,sun,decwrl}!parcplace!khaw

markley@celece.ucsd.edu (Mike Markley) (06/07/89)

In article <526@parcplace.pplace.COM> khaw@pplace () writes:
>Domain_OS 10.1, DN4500, bsd environment.
>
>I just made a tar tape using:
>
>	tar cf /dev/rct12 .
>	cd somewhere else
>	tar cf /dev/rct12
>
>(rct12 is the non-rewinding 1/4" cart. tape drive device file).
               ^^^^^^^^^^^^^
This is the problem.  You must first rewind the tape.  I agree
that tar is broken if it doesn't understand that the tape needs
to be rewound.

>

Mike Markley
University of California, San Diego
markley@celece.ucsd.edu
markley@kubrick.ucsd.edu

khaw@pplace.COM (Mike Khaw) (06/09/89)

<6592@sdcsvax.UCSD.Edu>, by markley@celece.ucsd.edu (Mike Markley):
+ In article <526@parcplace.pplace.COM> khaw@pplace () writes:
+>Domain_OS 10.1, DN4500, bsd environment.
+>
+>I just made a tar tape using:
+>
+>	tar cf /dev/rct12 .
+>	cd somewhere else
+>	tar cf /dev/rct12
+>
+>(rct12 is the non-rewinding 1/4" cart. tape drive device file).
+                ^^^^^^^^^^^^^
+ This is the problem.  You must first rewind the tape.  I agree
+ that tar is broken if it doesn't understand that the tape needs
+ to be rewound.

No, my intent was to write a second tar archive on the tape, and it
apparently did that correctly, because I was able to read the 2 tar
archives on a Sun using its nonrewinding device file.  It seems to me
what an Apollo can write, it should be able to read back.

Mike Khaw
ParcPlace Systems, 1550 Plymouth St., Mountain View, CA 94043	415/691-6749
Domain=khaw@parcplace.com, UUCP={uunet,sun,decwrl}!parcplace!khaw