04-07-2006
Quote:
# uname -a
OSF1 sigbrrd V5.1 2650 alpha
#
# mt -f /dev/tape/tape0 rewind
#
# tar cvf /dev/tape/tape0 *032006*
a 01032006Tarjeta.dat.Z 2 Blocks
a 01032006aamcc.dat.Z 14 Blocks
a 01032006aamcg.dat.Z 19 Blocks
a 01032006aamcu.dat.Z 17 Blocks
a 01032006acmbc.dat.Z 91 Blocks
a 01032006ahmbc.dat.Z 1 Blocks
The rest deleted...
# mt -f /dev/tape/tape0 rewind
#
# tar tvf /dev/tape/tape0
blocksize = 256
-rw-r--r-- 202/0 977 Mar 3 06:37:57 2006 01032006Tarjeta.dat.Z
-rw-r--r-- 202/0 7088 Mar 2 05:48:20 2006 01032006aamcc.dat.Z
-rw-r--r-- 202/0 9393 Mar 2 02:02:55 2006 01032006aamcg.dat.Z
#
The main problem you have is that your tar program seems to have malfunctioned. 01032006aamcg.dat.Z has 9393 bytes but was recorded in 19 tape blocks. That means it had to use a blocksize of 512 writing 18 full blocks followed by one partial block. When tar reads a tape, it is supposed to figure out the blocksize. Your tar figured wrong. It picked 256 as it reported. I suspect that to be the problem. I don't understand how that choice is even possible. Blocksize is a multiple of 512. It has picked a blocking factor of one half or something like that.
Try specifying a blocking factor. 20 is considered a very safe choice.
tar cvbf 20 /dev/tape/tape0 *032006*
tar tvbf 20 /dev/tape/tape0
Since you are backing up .Z files, hardware compression won't buy you much. But you seem to think you're using hardware compression. A quick reading of the tru64 man pages suggests that you are not. /dev/tape/tape0c would be specifying compression. I got lost on the tru64 device naming docs and I can't test anything. You may or may not have other device naming troubles... I'm not sure.
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LEARN ABOUT OSF1
rpm2cpio
rpm2cpio(1) User Commands rpm2cpio(1)
NAME
rpm2cpio - convert Red Hat Package (RPM) to cpio archive
SYNOPSIS
rpm2cpio [file.rpm]
DESCRIPTION
The rpm2cpio utility converts the .rpm file specified as its sole argument to a cpio archive on standard output. (See NOTES.) If no argu-
ment is given, an rpm stream is read from standard input. In both cases, rpm2cpio will fail and print a usage message if the standard out-
put is a terminal. Therefore, the output is usually redirected to a file or piped through the cpio(1) utility.
EXAMPLES
Example 1: Converting an rpm file
example% rpm2cpio Device3Dfx-1.1-2.src.rpm | cpio -itv
CPIO archive found!
-rw-r--r-- 1 root root 2635 Sep 13 16:39 1998, 3dfx.gif
-rw-r--r-- 1 root root 11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz
-rw-r--r-- 1 root root 1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec
31 blocks
Example 2: Converting from standard input
example% rpm2cpio < Device3Dfx-1.1-2.src.rpm | cpio -itv
CPIO archive found!
-rw-r--r-- 1 root root 2635 Sep 13 16:39 1998, 3dfx.gif
-rw-r--r-- 1 root root 11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz
-rw-r--r-- 1 root root 1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec
31 blocks
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWrpm |
+-----------------------------+-----------------------------+
SEE ALSO
cpio(1), attributes(5)
NOTES
rpm2cpio handles versions 3 and 4 RPMs.
SunOS 5.10 20 Aug 2001 rpm2cpio(1)