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Parameter Data Formats
4 - 28 C141-E167
a. TST (Task Set Type)
This field specifies the type of task set defined below.
Value Description
000b Task set per logical unit for all initiators
001b Task set per initiator per logical unit
010b-111b Reserved
The IDD operates according to "000b". If other value is specified in this field, the IDD reports a
"CHECK CONDITION" status (ILLEGAL REQUEST [=5] / Invalid parameter in list [=26-00]).
b. GLTSD (Global Logging Target Save Disable) (not supported)
This bit specifies whether or not to permit the saving treatment of peculiar logging parameter
within the IDD.
Since the IDD performs the saving treatment with itself algorithm regardless of specified value
in this bit, disregards the specification in this bit.
c. RLEC (Report Log Exception Condition) (not supported)
This bit controls operations in cases where the accumulated value log parameter reaches the
maximum value.
"1" : The IDD reports a CHECK CONDITION status (UNIT ATTENTION [=6] / Log counter
at maximum [5B-02]).
"0" : The IDD executes the command which is issued next normally.
Since the IDD does not support the reporting function of exception condition, the IDD disregards
the specification in this bit.
d. Queue algorithm qualifier
This parameter controls the execution order algorithm of a command issued together with a
SIMPLE QUEUE TAG message.
When "0" is specified in this parameter, the IDD may change the queued command execution
order in order to achieve the best performance.
The commands that may be reordered are:
Read, Read Extend, Write, Write Extend.
In case the commands whose specified LBAs are overlapped, the order of the commands in
question are kept to ensure the Data Integrity.
When "1" is specified in this parameter, the IDD may change the queued command execution
order in order to achieve the best performance.
The commands that may be reordered are:
Read, Read Extend, Write, Write Extend.