New Cygwin DLL 1.3.6 release & tapes ??

New Cygwin DLL 1.3.6 release & tapes ??

[Manfred Drechsel]

hi chris,

first, many thanks for cygwin. i could not survive
without it.

sorry to send you a mail directly.

am i doing something wrong or why does tar not
work on my dat-tape?

here's more info:

----------------------------------------
# mount
...
\\.\tape0 on /dev/st0 type system (binmode)
...
#
# mt -f /dev/tape rewind
#
# tar -tf /dev/tape
tar: /dev/tape: Cannot read: Permission denied
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now
#
# ls -l /dev/tape
lrwxrwxrwx    1 Manfred  None          101 Dec  7 19:39 /dev/tape ->
/dev/st0
#
# ls -l /dev/st0
crw-rw-rw-    1 Everyone Everyone  18,   0 Dec  7 22:39 /dev/st0
#
# tar --version
tar (GNU tar) 1.13.19
...
#
# cygcheck.exe  -s
...
Windows NT Ver 4.0 Build 1381 Service Pack 6
...
cygwin              1.3.6-4
...
#
----------------------------------------

so the 'permission denied' is the problem. i think, version 1.3.4 worked.
v1.3.5 had the same problem.

any idea?

thanks for any help

Manfred

mailto:Manfred@TR1.de




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Re: New Cygwin DLL 1.3.6 release & tapes ??

[Corinna Vinschen]

On Fri, Dec 07, 2001 at 10:43:02PM +0100, Manfred Drechsel wrote:
> hi chris,
> 
> first, many thanks for cygwin. i could not survive
> without it.
> 
> sorry to send you a mail directly.
> 
> am i doing something wrong or why does tar not
> work on my dat-tape?
> 
> here's more info:
> 
> ----------------------------------------
> # mount
> ...
> \\.\tape0 on /dev/st0 type system (binmode)

  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  That mount point is unnecessary since 1.3.3, see Users Guide:
  http://cygwin.com/cygwin-ug-net/using-specialnames.html#AEN590

> #
> # mt -f /dev/tape rewind
       ^^^^^^^^^^^^
       unnecessary since /dev/tape is the default device name for
       mt version >= 2.0.

> # tar -tf /dev/tape
> tar: /dev/tape: Cannot read: Permission denied
> tar: At beginning of tape, quitting now
> tar: Error is not recoverable: exiting now

Probably wrong blocksize.  See if the blocksize is set correctly:

$ mt status 2
tape capacity    :  1953251 KB          remaining        :  1953251 KB
current block    :        0             write protected  :       no             datcompression   :       on
min block size   :        1             max block size   :    65536
def block size   :    16384             cur block size   :      512
report setmarks  :       on

Then try using the correct fixed blocksize if you know it:

  mt selblk 5120

Or variable blocksize for reading if you don't know the blocksize
used for writing the tape:

  mt setblk 0

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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