HP Q1581A HP DDS/DAT drives UNIX, Linux and OpenVMS configuration guide (DW049 - Page 35

Parameter, Value, Meaning, tape density.

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The syntax for HP-DDS-4, HP-DAT72 and HP-DAT160 on Solaris 9, 10 (and 8 with the latest st patch) is: = , , , , , , , ..., , , , , , , , , where: Parameter Value Meaning 1 Indicates the format of the following parameters. 0x34 The value for a DAT drive in /usr/include/sys/mtio.h. 0 Indicates variable block size. 0xd639 Derived from constants in /usr/include/sys/scsi/targets/stdef.h. or The value determines which operations the driver can perform with the 0x18679 attached device by using a unique value for each feature and then adding them together to form the options value: Options value: 0xd639 0x18679 0x001 Device supports variable length records. Yes Yes 0x008 Device can backspace over files (as in the Yes Yes 'mt bsf' option). 0x010 Device supports backspace record (as in Yes Yes 'mt bsr'). 0x020 Device requires a long time-out period for Yes Yes erase functions. 0x040 Device will automatically determine the No Yes tape density. 0x0200 Device knows when end of data has been Yes Yes reached. 0x0400 Device driver is unloadable. Yes Yes 0x1000 Time-outs five times longer than normal. Yes No 0x4000 Driver buffers write requests and Yes No pre-acknowledges success to application. 0x8000 Variable record size not limited to 64 KB. Yes Yes 0x10000 Device determines which of the two mode No Yes pages the device supports for selecting or deselecting compression. 1 There is one density code following in the parameter list. HP Evolution II DDS/DAT drives: UNIX, Linux and OpenVMS configuration guide 35

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HP Evolution II DDS/DAT drives: UNIX, Linux and OpenVMS configuration guide
35
The syntax for
HP-DDS-4
,
HP-DAT72
and
HP-DAT160
on Solaris 9, 10 (and 8 with the latest st patch)
is:
<drive type> = <version>, <type>, <bsize>, <options>,
<no. of densities>, <density 0>, <density 1>, ..., <density n>,
<default density>, <non-motion timeout>, <read/write timeout>,
<rewind timeout>, <space timeout>, <load timeout>,
<unload timeout>, <erase timeout>
where:
Parameter
Value
Meaning
<version>
1
Indicates the format of the following parameters.
<type>
0x34
The value for a DAT drive in
/usr/include/sys/mtio.h
.
<bsize>
0
Indicates variable block size.
<options>
0xd639
or
0x18679
Derived from constants 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:
Options value:
0xd639 0x18679
0x001
Device supports variable length records.
Yes
Yes
0x008
Device can backspace over files (as in the
‘
mt bsf
’ option).
Yes
Yes
0x010
Device supports backspace record (as in
‘
mt bsr
’).
Yes
Yes
0x020
Device requires a long time-out period for
erase functions.
Yes
Yes
0x040
Device will automatically determine the
tape density.
No
Yes
0x0200
Device knows when end of data has been
reached.
Yes
Yes
0x0400
Device driver is unloadable.
Yes
Yes
0x1000
Time-outs five times longer than normal.
Yes
No
0x4000
Driver buffers write requests and
pre-acknowledges success to application.
Yes
No
0x8000
Variable record size not limited to 64 KB.
Yes
Yes
0x10000
Device determines which of the two mode
pages the device supports for selecting or
deselecting compression.
No
Yes
<no. of
densities>
1
There is one density code following in the parameter list.