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Date: Sat, 8 Aug 1998 14:07:12 -0500
From: Dan Nelson <dnelson@emsphone.com>
To: Jeff Kletsky <Jeff@Wagsky.com>, freebsd-questions@FreeBSD.ORG
Subject: Re: multi-session dump on single tape
References: <l03110701b1f189096690@[192.168.6.3]>
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In the last episode (Aug 07), Jeff Kletsky said:
> which seems to work fine for tar and a single dump, but I have not been
> able to determine the "magic" required to place multiple dump sessions on a
> single tape.
> 
> I have tried the following, then using restore -t, restore -t -s 1, restore
> -t -s 2, with mt rewind and mt fsf thrown in liberally and in various
> combinations to see if the dump is there.
> 
> mt erase
> dump -0au /
> 
> works,
> but any of the following seem to leave only a single session on the tape
> 
> mt erase
> dump -0au /
> dump -0au /var

dump defaults to /dev/rst0, which is a "rewind-on-close device".  Try

mt rewind
dump 0auf /dev/nrst0 /
dump 0auf /dev/nrst0 /var
mt rewind

A quick way to see how many files are on a tape (and the blocksize and
total size of each file) is to run "tcopy /dev/rst0".

	-Dan Nelson
	dnelson@emsphone.com

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