🚀 go-pugleaf

In article <33783B4A.63DB@erols.com>,
Michael E. Ehinger <mepe@erols.com> wrote:
>I am using GTAR v. 1.10 along with GTAK v. 2.51 to back up my system to
>an Archive Anaconda 2750 SCSI tape drive.
>
>My backup script (reduced to its essentials):
..
>On the whole, this works well: it backs up drives C, E and F fully to
>the tape, with each drive in a separate volume, creates a directory file
>for each tape for use with QFA and gives me a log file I can check to
>insure that everything has gone properly.
>
>However, I've encountered a couple of problems in trying to improve on
>this:
>
>I can't seem to get a directory listing that includes absolute path
>names (when I try the -P option I get a message that "file -P" can't be
>found in the archive).
>
>Question: whenever I attempt to get a directory listing of the tape
>{"tar tpv"), I get a message "Removing absolute path indicators".  Does
>this mean that the absolute path indicators are actually being removed
>from the tape itself (ie: I won't be able to restore my files exactly as
>they were using the "-P" option)?

It probably is removing them from the tar on the tape while displaying
it.  The original on the tape remains as it is.

I had trouble restoring with absolute paths, and now I remove them
before archiving them.

>
>I can't seem to figure out how to confirm that the files on the tape
>match the files on the drives.  I've tried every way I can think of to
>use the "--diff" option, but all I get is either a blank screen or a
>message that file "-P" or file "C:/*" can't be found in the archive.

Change the directory to the top level directory on that partition you
are about to verify.  Then do a verify with the absolute paths removed.

Also, I didn't have good results with the posix option....but that was a
few revisions back.

tar -cEf SCSI:+S2,TAPE$3 -p -pp -S -V %1 -D rel,c:\tape\totape.ndx "--buffer=buffer,-p24 -i20 -o80 -b1024 -s4096"   %2 %3 %4 %5 %6 %7 %8 %9

This is one of the forms I use for backing up a drive (actually a zip
archive of the drive since it takes care of long WPS paths which tar
would otherwise mangle.

>
>Is there any way I can get TAR to verify that the files on tape match
>those on the drive (and can I get it to limit its checking to one
volume >on the tape--ie: compare volume "Mondayc" with drive C:)? >
>Thanks.

There probably is, but I gave up on verify since it is pointless.  You
will get a bunch of "mode differs" errors since the archive bit changes,
as well as the unix type mode flags in the tar archive won't match the
translated mode flags on the disk. (again, this was a few revisions
back).

The verify is pointless because the tape drive I use reads immediately
after write with another head and corrects things if there was an error.
If it doesn't correct it, then it returns an error code to the program
which will stop backing up.

Well, the verify isn't exactly 100% pointless, 	there is a little bit of
chance things going wrong and the verify catching those things. 
However, there is the problem of nonessential error messages cluttering
the error codes.

My preference i to zip things before sending them off to the tape.  It
makes verifying easier and takes care of the long names.

Best Regards,

Mustafa Soysal

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