Hp C737990900 User Manual Page 91

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Commands 91
Commands
MODE SENSE 1Ah/5Ah
MODE SENSE allows the drive to return its current configuration and report
which configuration parameters can be changed through
MODE SELECT.
The mode sense header, block descriptor (optional), and zero or more of the
are sent to the host. Mode pages contain drive configuration parameters.
Some of these parameters are fixed, others are configurable (through the
MODE SELECT command). The host should use MODE SENSE to determine
which drive parameters are configurable and what their current values are
before using mode select to alter them.
Note See
MODE SELECT on page 72 for full descriptions of the Mode
Parameters.If a
MODE SENSE command is issued whilst an
immediate reported Load command is executing or close to
completing then the values of some parameters in some mode
pages which depend on the results of the load may be
undefined.
Similarly, the write-protect field in the Mode Parameter Header
will be unstable unless a cartridge is present and medium
removal is prevented.
Pre-Execution Checks:
The page code field must contain a valid mode page code or the value 0 or
the value 3Fh. If it does not then
CHECK CONDITION status is reported. Sense
data will be as described in the Illegal Field Checks.
Command Descriptor Block:
6-Byte Version
Illegal Field Reservation Deferred Error Unit Attention
7 6 5 4 3 2 1 0
0
Operation Code (1Ah)
1
Reserved (0) DBD Reserved (0)
2
PC Page Code
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