Nicki Messerschmidt, Linksystem Muenchen GmbH wrote:
...[snip]...

/etc/amanda/finanzbuch/chg-multi.conf:
statefile /etc/amanda/finanzbuch/changer-status
firstslot 1
lastslot 10
slot 1 file:/backup/disk1/tape01
...
slot 10 file:/backup/disk1/tape10

How have set up these directories?

Following "man amanda", the directories should contain
a directory "data".  You probably have the data-directory
on the same level as tapeXX, instead of below (yes, the
example in the man page shows a way to emulate one tape
drive with the contents of the tapes next, but in your
changer, each tape should be in his own "drive").
I also needed to add the following parameters to
chg-multi.conf:

multieject 0
gravity 0
needeject 0
ejectdelay 0

(at least, without the gravity parameter, amcheck complained loud).

So you should have:
        /backup/disk1/tape01/data/00000*thefileontape*
instead of
        /backup/disk1/tape01/00000*thefileontape*


...[snip]...

Extracting files using tape drive chg-multi on host localhost.
Load tape finanzbuch_007 now
Continue [?/Y/n/s/t]? Y
EOF, check amidxtaped.<timestamp>.debug file on localhost.

In that file you find the message:

  amidxtaped: time 0.254: slot 7: chg-multi: slot is empty

This gives a strong indication that your setup was wrong.

Try the following command too:

  $ amtape finanzbuch show
  amtape: scanning all 10 slots in tape-changer rack:
  slot 1: date 20030601 label finanzbuch_001
  ...
  slot 10: date 20030610 label finanzbuch_010

and tune your directory setup until this works fine.