HP LTO 4 SCSI, LTO 4 FC, LTO 4 SAS manual 4h-HW ERROR, Action

Code	Meaning	Comments
53 00	Media load or eject failed	A load or eject has failed.
	Action:	1.	Terminate the current I/O and return the appropriate
			error.
		2.	Inform the user that a serious fault has been detected
			with the tape cartridge.
		3.	Advise the user to discard this cartridge and select a
			new one.
		4.	Log the incident in the system log.
53 04	Medium thread or	The threading or unthreading operation failed.
	unthread failure
	Action:	1.	Terminate the current I/O and return the appropriate
			error.
		2.	Inform the user that a serious fault has been detected
			with the tape cartridge.
		3.	Advise the user to discard this cartridge and select a
			new one.
		4.	Log the incident in the system log.

4h—HW ERROR

The following actions apply to most additional sense codes for HW ERROR sense key:

Action:

1.Terminate the current I/O and return the appropriate error.

2.The software should disable all further transactions to the drive and mark the drive as ‘bad’.

3.The software should tell the user that a serious fault has been detected with the drive and advise them to call their technical support.

4.Log the incident in the system log.

Code	Meaning	Comments
40 XX	Diagnostic failure on	A self-test command has detected an error, or a
	component XX	command is prohibited from execution due to failure of a
		previous diagnostic. “XX” is a vendor-specific code
		indicating the failing component.
	Action:	see above
44 00	Internal target failure	This code is used to report hardware and firmware
		related hard errors that occur when the drive encounters
		an “impossible” situation.
	Action:	see above

HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 67 HP restricted