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- Newsgroups: comp.sys.sun.admin
- Path: sparky!uunet!spsgate!mogate!newsgate!wdc!mario
- From: mario@wdc.sps.mot.com (Mario Nigrovic)
- Subject: Re: How to put two dumps on one tape?
- Message-ID: <1992Aug17.181418.23847@newsgate.sps.mot.com>
- Originator: root@mogate.sps.mot.com
- Sender: mario@wdc (Mario Nigrovic)
- Nntp-Posting-Host: 223.199.55.4
- Organization: Motorola Western MCU Design Center, Chandler Arizona
- References: <1992Aug16.073907.2933@athena.mit.edu> <66127@hydra.gatech.EDU>
- Date: Mon, 17 Aug 1992 18:14:18 GMT
- Lines: 48
-
- In article <66127@hydra.gatech.EDU>, dsm@prism.gatech.EDU (Danny McGurl) writes:
- |> ross@mecha.mit.edu (Ross Levinsky) writes:
- |>
- |> >Here's an easy one. I have two Suns, and since their / partitions are so
- |> >small, I'd like to dump them to both to one tape (sequentially) with the
- |> >"dump" command. How do I do this (preferably without using the no-rewind
- |> >options), and how do I restore the partitions correctly when they're
- |> >sequential?
- |>
- |> Basicly, you don't. The no rewind device is what this job calls for, and if
- |> you aren't willing to use it then there is no solution.
- |>
- |> Consider this: After you dump the first file to the tape (and it rewinds
- |> since you aren't using the no-rewind device), then *something* will have to
- |> skip to the end of file mark. Does it matter if a program does it or if you
- |> write some shell script that uses mt to do it?
- |>
- |> As long as you always back the machines up in the same order, you shouldn't
- |> have to worry too much about keeping the dumps straight.
- |> --
- |> Danny McGurl "No, no Pixel! Beer is not for baby cats."
- |> Office of Information Technology --Richard Ames,
- |> dsm@prism.gatech.edu __The Cat Who Walks Through Walls__
-
- You don't indicate what type of tape, so I'll assume 1/4" Cartridge. If the
- machines are networked together, you can write a script which will perform the
- dump from the first machine (with NO REWIND, sorry, can't avoid that) and then
- the script can rsh to the other machine and do a RDUMP to the first machine's
- tape (this time to the REWINDING device).
-
- I have had almost NO success attempting to "add on" to the end of
- an exabyte 8mm tape, except writing all dumps in sequence.
-
- If you want to read multiple tar files from a single tape, remember that
- tar will NOT read the end-of-file mark on the tape so a "mt fsf 1" will
- be required between successive tars.
-
- Hope this isn't too long but still helps!
-
- --
-
- Mario
-
- Mario Nigrovic <mario@wdc.sps.mot.com> voice: (602) 821-4264
- Motorola Western MCU Design Center fax: (602) 821-4058
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