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C141-E124-01EN 3 - 109
Remark:
The error recovery control flag is valid only for PER. Therefore, the only error recovery flag
combination that is actually executed in the above self-diagnosis tests is the (PER, DTE) = (1,
0) combination.
(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]).
Figure 3.18 shows 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.
Notes
1. When “0” is specified in the “SelfTest (self test)” bit in this command, the INIT can
specify only a single parameter page.
2. In order to avoid loss of security to the execution results (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 issue this command linked to the RECEIVE
DIAGNOSTIC RESULTS command or reserve the IDD before issuing this command,
and should release the reserve status after executing the RECEIVE DIAGNOSTIC
RESULTS command.
3. When a command other than the RECEIVE DIAGNOSTIC RESULTS command is linked to
this command, the execution results (response data) may no longer be secure.