Send Diagnostic 1Dh - Sony DDS-4 Product Description Manual

6. COMMAND SPECIFICATION

6. 23 SEND DIAGNOSTIC 1Dh

Bit 7
Byte
0
1 Logical Unit Number
2
3 (MSB)
4
5 Unused (00b)
SEND DIAGNOSTIC tells the drive to perform diagnostic tests on itself.
PF: The drive expects the Page Format bit to be set to indicate that the parameters transferred during the DATA OUT
phase will include four bytes of header information as well as the diagnostic test bytes.
If this bit is not set the parameter bytes will only describe the diagnostic test. Note that if the SelfTest bit is set, this
bit must be zero else the drive will return CHECK CONDITION with the ILLEGAL REQUEST sense key set.
SelfTest:
When this bit is set the drive executes its POWER-ON SEQUENCE. The Parameter List Length must be zero when
this bit is set other-wise the drive will return a CHECK CONDITION status with an ILLEGAL REQUEST sense
key set.
DevOfl:
Device Offline is not supported and shall be set to zero, otherwise the driver will return a CHECK CONDITION
status with an ILLEGAL REQUEST SENSE key set.
UnitOfl:
This bit must be set for proper operation of any diagnostic test except selftest. If this bit is not set, except for selftest,
the drive will return a CHECK CONDITION status with an ILLEGAL REQUEST sense key set.
Parameter List Length:
This field provides the count of the number of Parameter List bytes which will be transferred in the DATA OUT
phase. These bytes describe the test that is to be run. This field must be set to zero if the SelfTest bit is set.
6 5 4
Operation Code (1Dh)
PF
Parameter List Length
3 2
Reserved SelfTest
Reserved
Reserved
SONY SDT-10000/SDT-11000 DDS Tape Drive
SEND DIAGNOSTIC
1 0
DevOf1 (0) UnitOfl
(LSB)
6 - 89