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5.1 Mode Parameters
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 HDD operates according to "000b". If other value is specified in this
field, the HDD reports a "CHECK CONDITION" status (ILLEGAL
REQUEST [=5] / Invalid parameter in list [=26-00]).
b. Queue algorithm qualifier
This parameter controls the execution order algorithm of a command issued
together with a SIMPLE QUEUE TAG.
"0000": The HDD executes commands queued from each INIT in the order
in which they were received. However, the command execution
order for the READ, READ EXTENDED and PRE-FETCH
commands may be changed.
"0001": The HDD executes queued commands by the method selected by
the HDD. At this time, the INIT must verify the correctness of the
data through appropriate commands.
"1111": The HDD prohibits to order queued commands.
When other value is specified in this parameter, the HDD reports a CHECK
CONDITION status (ILLEGAL REQUEST [=5] / Invalid parameter in List
[=26-00]).
c. 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 HDD.
Since the HDD performs the saving treatment with itself algorithm regardless
of specified value in this bit, disregards the specification in this bit.
d. 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 HDD reports a CHECK CONDITION status (UNIT ATTENTION
[=6] / Log counter at maximum [5B-02]).
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