Help on cpio: how to read backup tapes with cpio command?

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2 total messages Started by Rafique Mahmood Wed, 16 Dec 1992 19:26

#23

Author: Rafique Mahmood
Date: Wed, 16 Dec 1992 19:26

26 lines
1630 bytes

We are doing backup remotely with cpio command. Our tape drive is with machine
'peach'. We do backup of machine 'backup_machine'. We have scripts to do it.
We have many systems but backup is done from one central machine. 

I don't understand shell script yet (working on it). It is very complecated. 
When I was running the bacup I got the process listing which shows :

  backup 22545 22544  0 11:53:41 ?         0:00 rsh peach -l tape dd conv=block obs=5120 of=/dev/nrst1 
  backup 22551 22545 35 11:53:41 ?         2:39 rsh peach -l tape dd conv=block obs=5120 of=/dev/nrst1 
  backup 22547 22545 18 11:53:41 ?         1:57 cpio -o 
  backup 22548 22546  0 11:53:41 ?         0:07 find /etc/aliases /etc/cshrc /etc/group /etc/hosts /etc/init.d /etc/motd /e

and some other which is our scripts.


Now, within a day or two I need to write a program which will make a listing of the
backup tapes. I looked at the cpio manuals but did not know what to do.

If any one can help me on this I will appreciate it very much. I use tar all the time 
but this is different. I loged in to 'peach' and tried 'cpio -tBi /dev/nrst1', it
didnot work.

Thanks for any info.

Rafique,
email: mahmood@lambda.msfc.nasa.gov

Re: Help on cpio: how to read backup tapes with cpio command?

#25

Author: Paul Jackson
Date: Wed, 16 Dec 1992 21:59

29 lines
1617 bytes

In article <1992Dec16.192634.19294@lambda.msfc.nasa.gov>, mahmood@lambda.msfc.nasa.gov (Rafique Mahmood) writes:
|> I need to write a program which will make a listing of the
|> backup tapes. I tried 'cpio -tBi /dev/nrst1', it did not work.

If you look at the man page for cpio carefully (do "man cpio") you
will see:

    cpio -i[BbcdmrtuvVfsSb6k] [-C bufsize] [[-I file] [-M message]] [pattern ...]

and a bit later:

    cpio -i (copy in) extracts files from the standard input

Observe that the archive or tape device is _not_ listed amongst
the expected arguments of "cpio -i", and that it expects input
instead from standard input.  This means that the following might
work better for you:

    cpio -tBi < /dev/nrst1

There may have been other questions in your posting, but I could
not quite understand what you were asking, so my apologies for not
answering what else you might be asking.

-- 

				I won't rest till it's the best ...
				Software Production Engineer
				Paul Jackson (pj@sgi.com), x1373

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