HP Ultrium Tape Drive User Manual download pdf (Page 30)

Sun Systems, Solaris 8, 9, 1030

Values for the parameters for name are as follows:

<bsize> 0 Indicates variable block size.

<options> 0xd639 or

0x18659

This value is derived from constants provided in /usr/include/sys/

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

densities>

4 There are four densities following in the parameter list.

<density n> 0x00 Creates a device file with compression disabled.

<density 3> 0x40,

0x42 or

0x44

The density code for data compression enabled by default.

<default

density>

3 Density 3 (0x44) is the default for Generation 3 drives.

<X timeout> All timeouts are in seconds

Parameter Value Meaning

target X

specifies the SCSI ID (target) of the device.

lun 0

Specifies the LUN for the device.

Parameter Value Meaning

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HP Ultrium Tape Drive User Manual Page 30

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