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3.4
Maintenance, Diagnostic Commands
3.4.1
SEND DIAGNOSTIC (1D)
Bit
7
Byte
0
1
2
0
3
4
5
0
This command executes self-diagnosis tests which the IDD is equipped to perform and
operation specified in the parameter list transferred from the INIT.
(1)
Self-Diagnosis Test
When the "SelfTest (self test)" bit in the CDB is "1," this command specifies execution of the
self-diagnosis test which the IDD is equipped to perform. At this time, the "PF (page format)"
bit and the "Parameter list length" field in the CDB have no meaning and the values specified
there are disregarded.
operations which have an influence on the status of logical units other than the logical unit
specified in this command during the self-diagnosis test, but in the IDD, there is only 1 logical
unit that exists. Therefore, the specification in this bit has no meaning and the specified value
is disregarded.
The INIT can specify the type of self-diagnosis test to be executed through the "UnitOfl (unit
off-line)" bit. When "1" is specified in the "SelfTest (self test)" bit, the IDD executes a series
of self-diagnosis tests in accordance with the combination with the "UnitOfl (unit off-line)"
bit, as shown below.
1) Controller Function Test
2) Disk Drive Seek Test
3) Disk Media (CE Space) Write/Read/Data Comparison Test
6
5
4
LUN
PF
0
0
0
Parameter List Length (MSB)
Parameter List Length (LSB)
0
0
0
Also, the "DevOfl (device off-line)" bit specifies whether or not
Type of Self-diagnosis Test
C141-E039-01EN
3
2
X'1D'
0
SelfTest
0
0
0
0
UnotOfl = "0" UnitOfl = "1"
1
0
DevOfl
UnitOfl
0
0
Flag
Link
×
×
×
×
×: Execution Object
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