HP LTO 4 SCSI, LTO 4 FC, LTO 4 SAS Action, mechanism tests are being executed. When the tests are

Code	Meaning	Comments
30 03	Cleaning cartridge	A medium-access command has been sent to the drive
	installed.	while a cleaning cartridge was loaded.
	Action:	1.	Terminate the current I/O, and return the appropriate
			error.
		2.	Send a message to the console indicating that a
			cleaning cartridge is in the drive and a cleaning
			cycle is being performed.
		3.	Prompt the user to wait for the cartridge to be
			ejected. In a library, the cartridge will be ejected
			when requested by the library or host. In an internal
			or external single drive, the cartridge will be ejected
			automatically.
		4.	Prompt the user to proceed with the next
			application-specific activity.
		5.	Log the cleaning cycle in the system log.
3A 00	Medium not present	A medium-access command has been received when no
		cartridge is in the drive.
	Action:	As a minimum, issue a message to the console
		indicating that a drive is present but no tape is loaded.
3A 04	Medium not present,	A media access command has been received when the
	Media Auxiliary Memory	tape has been loaded but not threaded. This will be
	accessible	reported if the hold bit of the LOAD CDB was set or the
		Autoload field in the Control mode page is non zero.
3E 00	Logical unit has not	This is set during power-up when it is not possible to
	self-configured yet	send medium-access commands to the drive because
		mechanism tests are being executed. When the tests are
		complete, the additional sense changes to 3A 00h,
		04 01h or 04 02h depending on whether a cartridge
		was present at power-on.
	Action:	1.	Issue a message to the console indicating that the
			drive is powering up.
		2.	Effectively poll the drive until the drive transitions to
			another state, at which point either execute the
			command or terminate the I/O.

HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 61 HP restricted