Re: Unrecognized archive format with RELENG_6_2 and RELENG_6

[Robin Gruyters]

Quoting Tim Kientzle <[EMAIL PROTECTED]>:

After that I try to read/list the tar from tape with tar -t:
$ sudo tar -tf /dev/sa0
archive.dmp
tar: Unrecognized archive format: Inappropriate file type or format

But when I extract the archive from tape, it works perfectly:
$ sudo tar -xvf /dev/sa0

Using dd to feed tar does work though. (I think this agrees with Robin's
findings although the fact that it works with -z is curious)

This is a Tandberg TS400 (LTO2 drive, LTO1 tape)

idd, same problem here. When using -z option, works perfectly. Without it, it fails.

Our tapedrive is a "HP C7438A V312". (DAT)

Please try the following:

sudo ktrace tar -tf /dev/sa0

Then run 'kdump | less' and see if you can find a pair of 'lseek' calls,
which will probably look something like this:

 53127 bsdtar   CALL  lseek(0x3,0,0,0,0x1)
 53127 bsdtar   RET   lseek 6656000/0x659000
 53127 bsdtar   CALL  lseek(0x3,0,0x70800,0,0x1)
 53127 bsdtar   RET   lseek 7116800/0x6c9800

Here you go:

 95225 bsdtar   CALL  lseek(0x3,0,0,0,0x1)
 95225 bsdtar   RET   lseek 65536/0x10000
 95225 bsdtar   CALL  lseek(0x3,0,0,0,0x1)
 95225 bsdtar   RET   lseek 65536/0x10000


Robin Gruyters
Network and Security Engineer
Yirdis B.V.
I: http://yirdis.com
P: +31 (0)36 5300394
F: +31 (0)36 5489119

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