Optical Drive and Library SCSI-2 Command Reference

SCSI-2 Drive Command Set
Mode Sense (Group 0) Command (1AH)
Chapter 2 2-71
SCSI-2 Drive Commands
Quick
Disconnect A Quick Disconnect bit of 1 enables SCSI bus
disconnection before command validation on
performance path commands (i.e. reads, writes).
A Quick Disconnect bit of 0 disables SCSI bus
disconnection before validation on performance path
commands (i.e. reads, writes).
The Quick Disconnect default setting is 0.
Force Verify A Force Verify bit of 1 indicates that all write operations
will be verified. The Write 6-, 10-, and 12-byte
commands will operate as if they were Write Verify 6,
10, and 12-byte commands.
A Force Verify bit of 0 indicates normal operation.
The Force Verify default setting is 0.
Bytes 4 and 5 Bytes 4 and 5 are used to read the setting of the DIP
switches on the drive. SX-Y refers to the setting of DIP
switch S50X-Y (see Figure 2-1 on page 2-51 and
Table 2-44 on page 2-51). If SX-Y=0, the switch is set to
the OFF position; if SX-Y=1, the switch is set to the ON
position. These fields are not changeable. The switch
setting value overrides the saved value.
DOM A drive operating mode of 0 indicates that the drive is
installed in a jukebox environment. A DOM bit of 1
indicates that the drive is installed in a stand-alone
environment.
NOTE The DOM bit is not selectable using the Mode Select command.