HP BACKCOPY Reference Manual page 220

Cause. An attempt was made to restore a tape, but a BACKUP tape in the proper format could not
be found. Three possible reasons are:
BACKUP was stopped in the middle of a backup operation, resulting in an incomplete BACKUP
tape. The "Bad Tape Format" was detected when unwanted or meaningless information was
encountered at the interruption point on the tape.
The BACKUP tape was corrupted in some way.
Either BACKUP produced an invalid tape or RESTORE is not checking correctly due to a
software error.
Effect. RESTORE terminates.
Recovery. If the invalid format is the result of one of the first two causes, the files cannot be restored.
If you suspect the problem is a result of the third cause, 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 Event Management Service (EMS) logs, trace files, and a
processor dump, if applicable
If your local operation procedures require contacting the GCSC, supply your system number and
the numbers and versions of all related products as well.
7542
Unable to turn on tape buffering due to insufficient I/O
buffer space (file system error 33).
Cause. The tape process reported it was unable to allocate space for buffered mode.
Effect. BACKUP or RESTORE processing continues in unbuffered mode. The rate at which the tape
is read or written might be lower than expected.
Recovery. If this message appears frequently, check memory use on the node where the tape
process is running. If necessary, reconfigure the system to distribute memory use more evenly or
add more physical memory.
7750
Number expected.
Cause. A required number was missing.
Effect. BACKUP or RESTORE terminates.
Recovery. Reenter the command with the required number.
7751
Invalid BLOCKSIZE. Must be in the range 2 . . 30 and even.
Cause. An invalid data record size was specified.
Effect. BACKUP or RESTORE terminates.
Recovery. Make sure your BLOCKSIZE is an even integer value from 2 through 30, inclusive.
220 BACKCOPY, BACKUP, and RESTORE Messages