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extracting file form tape

 
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# 1  
Old 08-21-2002
extracting file form tape
Hello all,

I have done a search and follow the direction on how to extract a file form tar tape. With

1.) tar xf /dev/rmt/0 <filename>

2.) tar xf /dev/rmt/0 <fullpath/filename>

Both of these do not seem to work. Heres the scope I do daily backup of a 10g disk on to a DDS4 tape.
With the following command:

tar cvf /dev/rmt/0cnb /home/me

The machine is SunFire280 with solaris 5.8. I could just do a complete restore of the 10g but I do not have disk space for this. I just want to recover just 1 file from the 10g tar backup. Can anyone help?

Yes, I know that it would be better to do a ufsdump, but I don't want to put the machine into single user mode, which to my understanding is the best way to do a ufsdump, whit out data corruption.

THANKS
# 2  
Old 08-21-2002
Do a "tar tvf /dev/rmt/0" and look for the file that you want. Then do your your extract using the filename exactly the way it appeared on the listing. And if the filename is not on the listing you are out of luck.
# 3  
Old 08-21-2002
Check the tar file for the file you are looking for:
% tar tvf ./mytarredfiles.tar |grep myneeded.file
-rwxr-xr-x 1847/14 40 Jun 6 09:06 2001 ./test/myneeded.file

Then just grab the one file as it was listed:
%tar xf ../mytarredfiles.tar ./test/myneeded.file

This will create the directory (if any). If it shows up with /somedir/somefile, then it will extract back to there.
# 4  
Old 08-21-2002
It's been a while but can't wildcards be used with tar?

Ala,

tar -xvf /dev/my/tape/device ./*myfile*

EDIT:

Yeah, the wildcards work just fine. I would attempt to extract your file with prefix and postfix "*" although, you might pull a bunch of unwanted files. Depends on how unique the filename was.

Here is my testing the wildcards:

Code:
FreeBSD:auswipe:/home/auswipe/test $ ls -al
total 20
drwxr-xr-x   2 auswipe  auswipe   512 Aug 21 11:55 .
drwxr-xr-x  67 auswipe  auswipe  4608 Aug 18 02:00 ..
-rw-r--r--   1 auswipe  auswipe   458 Aug 15 10:20 clean.c
-rw-r--r--   1 auswipe  auswipe     1 Aug 15 09:48 file1
-rw-r--r--   1 auswipe  auswipe     1 Aug 15 09:48 file2
-rw-r--r--   1 auswipe  auswipe     1 Aug 15 09:48 file3
-rw-r--r--   1 auswipe  auswipe     1 Aug 15 09:48 file4
-rwxr-xr-x   1 auswipe  auswipe    64 Aug 15 10:35 test.sh
FreeBSD:auswipe:/home/auswipe/test $ tar -cvf mytar.tar *
clean.c
file1
file2
file3
file4
test.sh
FreeBSD:auswipe:/home/auswipe/test $ rm c*
FreeBSD:auswipe:/home/auswipe/test $ rm f*
FreeBSD:auswipe:/home/auswipe/test $ rm t*
FreeBSD:auswipe:/home/auswipe/test $ ls -al
total 18
drwxr-xr-x   2 auswipe  auswipe    512 Aug 21 11:55 .
drwxr-xr-x  67 auswipe  auswipe   4608 Aug 18 02:00 ..
-rw-r--r--   1 auswipe  auswipe  10240 Aug 21 11:55 mytar.tar
FreeBSD:auswipe:/home/auswipe/test $ tar -xvf mytar.tar *f*
file1
file2
file3
file4
FreeBSD:auswipe:/home/auswipe/test $ ls -al
total 26
drwxr-xr-x   2 auswipe  auswipe    512 Aug 21 11:56 .
drwxr-xr-x  67 auswipe  auswipe   4608 Aug 18 02:00 ..
-rw-r--r--   1 auswipe  auswipe      1 Aug 15 09:48 file1
-rw-r--r--   1 auswipe  auswipe      1 Aug 15 09:48 file2
-rw-r--r--   1 auswipe  auswipe      1 Aug 15 09:48 file3
-rw-r--r--   1 auswipe  auswipe      1 Aug 15 09:48 file4
-rw-r--r--   1 auswipe  auswipe  10240 Aug 21 11:55 mytar.tar

Last edited by auswipe; 08-21-2002 at 01:58 PM..
# 5  
Old 08-22-2002
Thanks

It was me. I did have the path the same as in the tar backup.
 
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