In addition I did an amverify DATAOND
This is the report on that:

Tapes:  DATAOND06
Errors found: 
DATAOND06 (daeserver._data_admin__intern.20060921.0):
amrestore:   0: skipping start of tape: date 20060922 label DATAOND06
amrestore:   1: restoring daeserver._data_admin__intern.20060921.0

gzip: stdin: unexpected end of file
amrestore:   2: reached end of information
/bin/tar: Onverwacht bestandseinde in archief
/bin/tar: Error is not recoverable: exiting now
64+0 in
64+0 out
DATAOND06 ():
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
DATAOND06 ():
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
DATAOND06 ():
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
DATAOND06 ():
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
DATAOND06 ():
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out

amverify DATAOND
vr sep 22 10:17:28 CEST 2006

Using device /dev/nht0
Volume DATAOND06, Date 20060922
** Error detected (daeserver._data_admin__intern.20060921.0)
amrestore:   0: skipping start of tape: date 20060922 label DATAOND06
amrestore:   1: restoring daeserver._data_admin__intern.20060921.0

gzip: stdin: unexpected end of file
amrestore:   2: reached end of information
/bin/tar: Onverwacht bestandseinde in archief
/bin/tar: Error is not recoverable: exiting now
64+0 in
64+0 out
** Error detected ()
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
** Error detected ()
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
** Error detected ()
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
** Error detected ()
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
** Error detected ()
amrestore: WARNING: not at start of tape, file numbers will be offset
amrestore:   0: reached end of information
** No header
0+0 in
0+0 out
Too many errors.











Since a couple of days i receive this error-report when a tape backup is
made :

These dumps were to tape DATAOND05.
*** A TAPE ERROR OCCURRED: [[writing file: Input/output error]].
Some dumps may have been left in the holding disk.
Run amflush to flush them to tape.
The next tape Amanda expects to use is: DATAOND06.

FAILURE AND STRANGE DUMP SUMMARY:
  xxxxxxxx  /data/daimail lev 1 FAILED [out of tape]
  xxxxxxxx  /data/home lev 2 STRANGE



Now when doing amflush I get this report:

The dumps were flushed to tape DATAOND06.
*** A TAPE ERROR OCCURRED: [[writing file: Input/output error]].
Some dumps may have been left in the holding disk.
Run amflush again to flush them to tape.
The next tape Amanda expects to use is: DATAOND07.

FAILURE AND STRANGE DUMP SUMMARY:
  daeserver  /data/admin_intern lev 0 FAILED [out of tape]

...

NOTES:
  driver: WARNING: /var/amanda/cache: 47185920 KB requested, but only
37455780 KB available.
  taper: tape DATAOND06 kb 448448 fm 1 writing file: Input/output error

DUMP SUMMARY:
                                     DUMPER STATS            TAPER STATS 
HOSTNAME     DISK        L ORIG-KB OUT-KB COMP% MMM:SS  KB/s MMM:SS  KB/s
-------------------------- --------------------------------- ------------
xxxxxxxx  -min_intern 0     N/A      0   --    N/A   N/A   FAILED  ----
xxxxxxxx  -ta/daimail   NO FILE TO FLUSH -----------------------------
xxxxxxxx  -a/dossiers   NO FILE TO FLUSH -----------------------------
xxxxxxxx  /data/home    NO FILE TO FLUSH -----------------------------
xxxxxxxx  -a/intranet   NO FILE TO FLUSH -----------------------------

(brought to you by Amanda version 2.4.4p2)