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- Path: sparky!uunet!sun-barr!olivea!sgigate!odin!twilight!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Newsgroups: comp.sys.sgi
- Subject: Re: append to backup tape
- Message-ID: <pfv1otg@zuni.esd.sgi.com>
- Date: 5 Sep 92 22:17:21 GMT
- References: <60106@mimsy.umd.edu>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 25
-
- In <60106@mimsy.umd.edu> dong@umiacs.umd.edu (Dong Chen) writes:
- | Is it possible at all to append the new backup to the end of tape ?
- | A lot of time I only want backup very few important files and feel it's
- | really waste to have only a few files on each tape.
-
- Depends on what you mean by 'append', and on what type of tape drive
- you have. You can always write multiple archives per tape, by
- using the norewind device and/or 'mt feom'. If you are talking about
- 'tar r', or 'tar u', that only works on drives that support overwrite,
- such as 9 track and DAT.
-
- | Also, after backup entire system on several tapes, it requires to go through
- | all the tapes to just restore one file if that one is on the last tape.
-
- This is a somewhat different issue. I assume you are talking about
- a multivolume backup (an archive that spans more than one tape).
- If you know for sure which tape a file is on, and the archive is a
- tar archive, you can usually start with the correct tape and use the
- 'e' option. You can probably also do this with cpio. It should also
- be possible with bru with the -F option, but I seem to recall bru
- being obnoxious about insisting that you start with tape #1.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-