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(2) Parameter specification
When "0" is specified in the "SelfTest (self test) bit in the CDB, the IDD executes the
operations specified in the parameter list transferred from the INIT by this command.
In this case, the IDD reports a GOOD status and terminates this command at the point
when preparation of the "response data" is completed after completing the specified
operations. The INIT can read the execution results (response data) by the RECEIVE
DIAGNOSTIC RESULTS command.
When the "PF (page format)" bit in the CDB is "1," the parameter list transferred
from the INIT by this command shows the page format, explained later, but the
IDD disregards the value specified in this bit and always handles the page format
according to the specifications in the parameter list when the parameter list is
transferred by this command. Also, when the "SelfTest (self test)" bit is "0," the
specifications in the "DefOfl (device off-line)" bit and the "UnitOfl (unit off-
line)" bit have no meaning and their specified values are disregarded.
The "Parameter list length" field in the CDB shows the length (number of bytes)
of the parameter list that is transferred from the INIT when the "SelfTest (self
test)" bit's specification is "0." When zero is specified in the "Parameter list
length" field, this command is terminated without anything being executed. Also,
when the value specified in the "Parameter list length" field does not reach the
specified length for the parameter list, explained later, and as a result, not all the
bytes in the parameter list can be received, that command is terminated with a
CHECK CONDITION status (ILLEGAL REQUEST) [=5] / Invalid field in CDB
[=24-00]).
Table 4.116 lists the format of the parameter list (called the parameter page)
transferred from the INIT to the IDD by this command. The parameter page is
configured from the 4-byte "Page Header" and the "Page Parameters" which follow it.
Furthermore, the INIT can specify only a single parameter page by this command.
Even when multiple parameter pages have been specified by the INIT, the IDD
executes only the operation specified by the top parameter page.
1. When "0" is specified in the "SelfTest (self test)" bit in this
2. In order to avoid loss of security to the execution results
C141-C012
command, the INIT can specify only a single parameter page.
(response data) of this command due to another command
issued by another INIT, when "0" is specified in the "SelfTest
(self test)" bit, the INIT should reserve the IDD before issuing
this command, and should release the reserve status after
executing the RECEIVE DIAGNOSTIC RESULTS command.
4.4 Maintenance, Diagnostic Commands
4-177
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