* [TUHS] 780 System III tape images
@ 2007-09-25 2:40 Al Kossow
2007-09-27 2:24 ` Warren Toomey
0 siblings, 1 reply; 6+ messages in thread
From: Al Kossow @ 2007-09-25 2:40 UTC (permalink / raw)
I've placed two sets of 800bpi 780 System III tape images
temporarily under http://bitsavers.org/sysIII
Curiously, they don't match. There were no dates on the tapes
which are originals.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [TUHS] 780 System III tape images
2007-09-25 2:40 [TUHS] 780 System III tape images Al Kossow
@ 2007-09-27 2:24 ` Warren Toomey
0 siblings, 0 replies; 6+ messages in thread
From: Warren Toomey @ 2007-09-27 2:24 UTC (permalink / raw)
On Mon, Sep 24, 2007 at 07:40:23PM -0700, Al Kossow wrote:
> I've placed two sets of 800bpi 780 System III tape images
> temporarily under http://bitsavers.org/sysIII
> Curiously, they don't match. There were no dates on the tapes
> which are originals.
I've found tapcat.pl and used it to extract the records from the four tapes.
Here's a quick table with truncated MD5s of the 7 records from tape 1 of each
set, and of the cpio archive which is on tape 2 of each set.
Tape Record What It Is Set 1 Set 2
---------------------------------------------------------
file0.dat boot record ce3dab ce3dab
file1.dat mini-root 693861 1b9183 different
file2.dat cpio binary 777632 777632
file3.cpio / 5b6ba5 5b6ba5
file4.cpio /usr/src/man 713ea0 713ea0
file5.cpio /usr/src/rje 8d146b 8d146b
file6.cpio /usr/src/graf 7e2afa 7e2afa
tape2.cpio /usr 51b5b1 a07403 different
tape2.cpio in set 2 seems to be slightly corrupt; cpio -ivt on the file
gives this warning:
-rw-rw-r-- 1 operator kmem 1052 Apr 12 1980 src/games/trk/win.c
-rw-rw-r-- 1 operator kmem 4147 Apr 12 1980 src/games/bj.s
cpio: warning: skipped 840 bytes of junk
-rw-rw-r-- 1 operator kmem 122 Apr 12 1980 src/games/us.s
-rw-rw-r-- 1 operator kmem 10036 Apr 12 1980 src/games/mail.c
Otherwise, the contents of the two tape2 files appears to be identical, i.e.
the cpio timestamps on all the files match up.
The two file1.dat records differ at position 721; I haven't attempted to
dig any further with these files yet.
Warren
^ permalink raw reply [flat|nested] 6+ messages in thread
* [TUHS] 780 System III tape images
2007-09-26 23:42 ` Andrew Warkentin
2007-09-26 23:55 ` Al Kossow
@ 2007-09-27 0:53 ` Warren Toomey
1 sibling, 0 replies; 6+ messages in thread
From: Warren Toomey @ 2007-09-27 0:53 UTC (permalink / raw)
> Al Kossow wrote:
> >I've placed two sets of 800bpi 780 System III tape images
> >temporarily under http://bitsavers.org/sysIII
On Wed, Sep 26, 2007 at 05:42:21PM -0600, Andrew Warkentin wrote:
> Why do I get read errors on the second file on the first tapes of both
> sets under SIMH? I didn't think it was even possible for tape I/O errors
> to occur under SIMH unless the image is corrupted.
Hmm, I seem to have lost the tools I used to use to manipulate tap files.
Can someone e-mail in pointers to useful tap tools?
Thanks,
Warren
^ permalink raw reply [flat|nested] 6+ messages in thread
* [TUHS] 780 System III tape images
2007-09-26 23:42 ` Andrew Warkentin
@ 2007-09-26 23:55 ` Al Kossow
2007-09-27 0:53 ` Warren Toomey
1 sibling, 0 replies; 6+ messages in thread
From: Al Kossow @ 2007-09-26 23:55 UTC (permalink / raw)
Andrew Warkentin wrote:
>
> Why do I get read errors on the second file on the first tapes of both
> sets under SIMH?
does it say which block number failed?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [TUHS] 780 System III tape images
[not found] <3368126406-2252@localhost>
2007-09-26 12:22 ` Andrew Warkentin
@ 2007-09-26 23:42 ` Andrew Warkentin
2007-09-26 23:55 ` Al Kossow
2007-09-27 0:53 ` Warren Toomey
1 sibling, 2 replies; 6+ messages in thread
From: Andrew Warkentin @ 2007-09-26 23:42 UTC (permalink / raw)
Al Kossow wrote:
>I've placed two sets of 800bpi 780 System III tape images
>temporarily under http://bitsavers.org/sysIII
>
>Curiously, they don't match. There were no dates on the tapes
>which are originals.
>
>_______________________________________________
>TUHS mailing list
>TUHS at minnie.tuhs.org
>https://minnie.tuhs.org/mailman/listinfo/tuhs
>
>
>
>
Why do I get read errors on the second file on the first tapes of both
sets under SIMH? I didn't think it was even possible for tape I/O errors
to occur under SIMH unless the image is corrupted.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [TUHS] 780 System III tape images
[not found] <3368126406-2252@localhost>
@ 2007-09-26 12:22 ` Andrew Warkentin
2007-09-26 23:42 ` Andrew Warkentin
1 sibling, 0 replies; 6+ messages in thread
From: Andrew Warkentin @ 2007-09-26 12:22 UTC (permalink / raw)
Al Kossow wrote:
>I've placed two sets of 800bpi 780 System III tape images
>temporarily under http://bitsavers.org/sysIII
>
>Curiously, they don't match. There were no dates on the tapes
>which are originals.
>
>
Why do I get read errors on the second file on the first tapes of both
sets under SIMH? I didn't think it was even possible for tape I/O errors
to occur under SIMH unless the image is corrupted.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2007-09-27 2:24 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-09-25 2:40 [TUHS] 780 System III tape images Al Kossow
2007-09-27 2:24 ` Warren Toomey
[not found] <3368126406-2252@localhost>
2007-09-26 12:22 ` Andrew Warkentin
2007-09-26 23:42 ` Andrew Warkentin
2007-09-26 23:55 ` Al Kossow
2007-09-27 0:53 ` Warren Toomey
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