HP Guardian Errors Manual page 51

Recovery Take corrective action appropriate to the device. If this error occurs with several tapes,
contact your service provider regarding a possible hardware problem.
153 (%231)
Cause The tape-drive power failed and was restored.
Effect The tape unit automatically returns to the ready state and to the beginning of the tape.
Recovery If two units are set to the same unit number when the power is restored, the wrong unit
might be placed online. To prevent this problem, ensure that all application programs perform a
rewind and unload operation when finished with a tape unit.
154 (%232)
Cause The tape unit encountered the beginning-of-tape (BOT) marker during a backspace-files or
backspace-records operation.
Effect Tape motion stops.
Recovery Corrective action is application dependent.
155 (%233)
Cause A seven-track tape device was specified for an operation requiring a nine-track tape (most
HP subsystems require a nine-track tape).
Effect The procedure sets the error code and returns without performing the requested operation.
Recovery Retry, specifying a drive configured for a nine-track tape.
156 (%234)
Cause This error can occur for the following reasons:
The tape command was rejected.
The procedure made a connect request (CONTROL 1 1) after the Tandem-to-IBM Link (TIL) was
already connected or after an internal link error occurred.
The TLAM process has entered an unrecoverable state.
For a TLAM error, a trace or processor dump is required to determine the exact nature of the
problem.
Effect The procedure aborts the call and disconnects the link. For a tape, no operation is performed.
Recovery For a rejected tape command, check that you indicated a valid command. Inform your
system manager that the tape controller is probably unloaded.
For a superfluous connect request, correct the coding error.
For an internal link error, contact your system operator.
157 (%235)
Tape drive power restored.
(device type: 4)
BOT detected during backspace files
or backspace records.
(device type: 4)
Only nine-track magnetic tape allowed
on this system. (device type: 4)
Tape command rejected, TIL or TLAM protocol
violation detected, or X25AM level-4 ITI
protocol violation. (device type: 4, 12, or 56)
I/O process internal system error.
(device type: any except 2)
Error Code Descriptions 51