HP BACKCOPY Reference Manual page 256

Recovery. Investigate whether a corrupt tape or the tape drive is causing the problem. If you suspect
that the error is due to a software problem, contact your service provider and provide all relevant
information:
The information in this message
Description of the problem and accompanying symptoms
Supporting documentation such as EMS logs, trace files, and a processor dump
If your operation procedures require contacting the GCSC, add your system number and the
numbers and versions of all related products.
8100
This program does not understand Archive tape format version
version (version-name).
Cause. The tape was made with a release of BACKUP that is incompatible with the release of
RESTORE being used to restore it.
Effect. RESTORE terminates.
Recovery. Use a version of RESTORE that is compatible with version.
8101
An EOF mark was found where an Archive volume label was
expected.
Cause. An invalid tape format was discovered.
Effect. RESTORE rewinds and unloads the tape and prompts for a tape.
Recovery. Check the tape and remount it. If the problem persists, see the cause and recovery for
error 8025 (page
8102
Both Archive begin volume label sets were bad.
Cause. Duplicate volume label sets were both bad due to parity or checksum errors.
Effect. RESTORE rewinds and unloads the tape and prompts for a tape.
Recovery. If the drive used has a manual density switch, make sure that it is set to the correct density
and try again. If the problem persists, see the cause and recovery for error
8103
The tape was not positioned at the load point.
Cause. A back space operation detected that the tape was not positioned at the load point.
Effect. BACKUP or RESTORE rewinds and unloads the tape and prompts for a tape.
Recovery. Reload the tape. If the problem persists, have the tape drive serviced.
8106
Unable to recognize the tape.
256 BACKCOPY, BACKUP, and RESTORE Messages
237).
8025 (page 237).