Hp Ultrium tape drives Q1538-90925 User Manual download pdf (Page 25)

HP Ultrium drives technical reference manual, volume 5: UNIX configuration guide 25

HP restricted

HP-Data Values

The values for HP_LTO_GEN_n and name, which provide normal LTO mode, have the following

meanings:

The syntax for HP_LTO_GEN_n on Solaris 9 is:

<drive type> = <version>, <type>, <bsize>, <options>, <no. of densities>,

<density 0>, <density 1>, <density 2>, <density 3>, <default density>,

<non-motion timeout>, <read/write timeout>, <rewind timeout>,

where:

Parameter Value Meaning

<version> 1 or 2 Indicates the format of the following parameters.

<type> 0x36 or

0x3B

The value for an Ultrium drive in /usr/include/sys/mtio.h. For

Solaris 8, 0x36 indicates a type of MT_ISOTHER. Later versions of

Solaris support the value 0x3B which indicates a type of MT_LTO.

<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.

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Hp Ultrium tape drives Q1538-90925 User Manual Page 25

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