HP LTO-4 Ultrium 1760, Technical Reference Manual

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HP LTO Ultrium 4 drives technical reference manual, volume 5: UNIX, Linux and OpenVMS configuration guide 35
Values for the parameters for
name
are as follows:
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 success,
variable records not limited to 64 KB, auto-density over-ride and
MODE SELECT
compression.
Similarly,
0x018659
indicates variable record length, bsf and bsr
enabled, automatic density determination, EOD recognition,
unloadable device driver, variable records not limited to 64 KB, and
device selection of mode pages for controlling 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> 0x46
The density code for data compression enabled by default.
<default
density>
3
Density 3 (
0x46
) is the default for Generation 4 drives.
<X timeout>
All timeouts are in seconds
Parameter Value Meaning
target X X
specifies the SCSI ID (target) of the device.
lun 0
Specifies the LUN for the device.
Parameter Value Meaning