HP LTO 4 SAS, LTO 4 FC, LTO 4 SCSI manual

	Flag	Type	Set	Recommended Host Message		Cause
24	Retension	W		The tape drive has requested a		The drive is having trouble
	requested			retension operation.		reading or writing that will
						be resolved by a retension
						cycle.
25	Dual-port	W		A redundant interface port on the		One of the interface ports in
	interface error			tape drive has failed.		a dual-port configuration (in
						other words, Fibre Channel)
						has failed.
Flags for Tape Drive Hardware Errors
26	Cooling fan	W		A tape drive cooling fan has failed.		A fan inside the drive
	failure					mechanism or enclosure has
						failed.
27	Power supply	W		A redundant power supply has failed		A redundant PSU has failed
	failure			inside the tape drive enclosure.		inside the tape drive
				Check the enclosure user’s manual		enclosure or rack subsystem.
				for instructions on replacing the
				failed power supply.
28	Power	W		The tape drive power consumption is		The tape drive power
	consumption			outside the specified range.		consumption is outside the
						specified range.
29	Drive	W		Preventive maintenance of the tape		The drive requires preventive
	maintenance			drive is required.		maintenance (not cleaning).
				Check the tape drive user’s manual
				for preventive maintenance tasks or
				call the tape drive supplier’s helpline.
30	Hardware A	C		The tape drive has a hardware fault:		The drive has a hardware
				1. Eject the tape or magazine.		fault from which it can
						recover through a reset.
				2.	Reset the drive.
				3.	Restart the operation.
31	Hardware B	C		The tape drive has a hardware fault:		The drive has a hardware
				1. Turn the tape drive off and then		fault that is not read/write
						related or that it can recover
					on again.
						from through a power cycle.
				2.	Restart the operation.
						The flag is set when the tape
				3. If the problem persists, call the
						drive fails its internal
					tape drive supplier’s helpline.
						power-onself-tests. It is not
						cleared internally until the
						drive is powered off.

HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 83 HP restricted