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

SCSI command	Supported during initialization
REQUEST SENSE	Yes
REPORT DENSITY REPORT	No
REPORT LUNS	Yes
SEND DIAGNOSTIC	No
TEST UNIT READY	Yes
WRITE ATTRIBUTE	No

When the drive has completed the second step of initialization, it will respond normally to all supported commands, and it will report the correct Manufacturing Date Code and Serial Number in the corresponding fields of the Get Drive Info RDATA.

HP recommend that automation controllers use the Get Drive Status command to detect the completion of the second step of tape drive initialization. After the drive sends the first <ENQ> character and until it completes the second step of initialization, it will respond to a Get Drive Status command with BUSY status. After the drive has completed the second step of initialization, it will respond normally to the Get Drive Status command.

Encryption support

For parallel SCSI and SAS drives, the RDATA returned by the Get Drive Status command contains an Encryption Status field:

	7	6	5	4	3	2	1	0
0	Vendor	Cartridge	Prevent Media	Write Protect	Ready	Ready	Cartridge	Ready
	Unique	Present	Removal		Eject	Access	Load	Load
1		Cartridge Type		Compression		Tape Activity
2	Drive	Media	TapeAlert	Rsvd	Clean	Cleaning	Clean	Clean
	Error	Error			Expired		Required	Needed
3–4				Reserved
5			Reserved			Encryption Status		WORM

For FC drives, the RDATA returned is in the following format:

	7	6	5	4	3	2	1	0
0	Vendor	Cartridge	Prevent Media	Write Protect	Ready	Ready	Cartridge	Ready
	Unique	Present	Removal		Eject	Access	Load	Load
1		Cartridge Type		Compression		Tape Activity
2	Drive	Media	TapeAlert	Reserved	Clean	Cleaning	Clean	Clean
	Error	Error			Expired		Required	Needed
3	Port 0		Port 0 Topology			Port 0 Speed
	Active
4	Port 1		Port 1 Topology			Port 1 Speed
	Active

HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 41 HP restricted