Sun Systems, Solaris 8, 9, 1030
Values for the parameters for name are as follows:
<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 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>
0x40
(Gen 1)
0x42 (Gen 2)
The density code for data compression enabled by default.
<default
density>
3
Density 3 is the default (0x40 for Generation 1 drives, 0x42 for
Generation 2 drives)
<X timeout>
All timeouts are in seconds
target
XX specifies the SCSI ID (target) of the device.
lun 0
Specifies the LUN for the device.
Parameter Value Meaning
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