HP Ultrium Tape Drive manual Values for the parameters for name are as follows

Parameter	Value	Meaning
<bsize>	0	Indicates variable block size.
<options>	0xd639 or	This value is derived from constants provided in /usr/include/sys/
	0x18659	scsi/targets/stdef.h. The value determines which operations the
		driver can perform with the attached device by using a unique value for
		each feature and then adding them together to form the options value.
		Supported features will vary with OS revision, and may include the
		following:
		0x001	Device supports variable length records.
		0x008	Device can backspace over files (as in the ‘mt bsf’ option).
		0x010	Device supports backspace record (as in ‘mt bsr’).
		0x020	Device requires a long time-out period for erase functions.
		0x040	Device will automatically determine the tape density.
		0x0200	Device knows when end of data has been reached.
		0x0400	Device driver is unloadable.
		0x1000	Time-outs five times longer than normal.
		0x4000	Driver buffers write requests and pre-acknowledges success
			to application.
		0x8000	Variable record size not limited to 64 KB.
		0x10000	Device determines which of the two mode pages the device
			supports for selecting or deselecting compression.
		So 0xd639 indicates variable record length, bsf and bsr enabled, long
		timeouts for erase, EOD recognition, Unloadable device driver, 5 x
		longer timeouts, buffer writes and pre-acknowledge sucess, variable
		records not limited to 64 KB, auto-density over-ride and MODE SELECT
		compression.
<no. of	4	There are four densities following in the parameter list.
densities>
<density n>	0x00	Creates a device file with compression disabled.
<density 3>	0x40,	The density code for data compression enabled by default.
	0x42 or
	0x44
<default	3	Density 3 (0x44) is the default for Generation 3 drives.
density>
<X timeout>		All timeouts are in seconds

Values for the parameters for name are as follows:

Parameter	Value	Meaning
target	X	X specifies the SCSI ID (target) of the device.
lun	0	Specifies the LUN for the device.

30 Sun Systems, Solaris 8, 9, 10