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- Path: xceed.cac.washington.edu!user
- From: donn@u.washington.edu (Donn Cave)
- Newsgroups: comp.unix.amiga
- Subject: Re: Tape Backups: what software to uese?
- Date: Thu, 04 Jan 1996 09:07:20 -0800
- Organization: University of Washington
- Message-ID: <donn-0401960907200001@xceed.cac.washington.edu>
- References: <4cg1o3$aau@pellew.ntu.edu.au>
- NNTP-Posting-Host: xceed.cac.washington.edu
-
- In article <4cg1o3$aau@pellew.ntu.edu.au>, hoffmann@morinda.it.ntu.edu.au
- (Arthur Hoffmann) wrote:
- ...
- | What is the best way to backup the whole filesystem?
- | I have 2.7G HD storage and the Tapesize is 525Mb, so I assume I need
- | to use something that lets me archive to multiple volumes. I found tar
- | does the job, but I have to be very careful because it core dumps when
- | it comes across some files it can't read.
-
- The best way to backup a filesystem is the "dump" command.
- It does handle multiple volumes. There's a historical feature
- that makes it stop after a certain number of blocks and prompt
- for the next reel, because some older tape devices didn't report
- end-of-tape in a useful way; you can effectively override this
- by lying about the tape size, and I believe on most modern
- drives it will know when it really does hit the end of the tape.
- You'll have to experiment with that - I've never hit the end
- of a tape, 8mm cartridges are too big and too cheap to bother
- filling all the way up.
-
- "dump" knows about filesystems. It will leave other filesystems
- alone when it runs into them, so you don't have to unmount
- everything else to back up the root file system.
-
- The complementary "restore" command is interactive: it gets
- a list of files off the tape, and allows you to "cd" around in its
- directory hierarchy and "add" specific files; then when you
- "extract" the list of added files it knows how to read through
- the tape volumes and get them all. There are also non-interactive
- options, for when you want to restore the whole file system or
- something. It knows how to restore device files, etc.
-
- Donn Cave, University Computing Services, University of Washington
- donn@u.washington.edu
-