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SCSI Commands
Quantum DLT 8000 Tape System 5-43
LOG SELECT Command (4Ch) (continued)
Table 5–18 Log Parameters Field Descriptions (continued)
Field Name Description
TMC Threshold Met Criteria. Once the criteria specified in this field is met
and the ETC bit is 1 and the RLEC bit in MODE SENSE / SELECT Control
Page is set to 1, then UNIT ATTENTION is generated for all initiators.
The criteria for comparison are:
Code Basis of Comparison
00b Every update of the cumulative value
01b Cumulative value equal to threshold value
10b Cumulative value not equal to threshold value
11b Cumulative value greater than threshold value
The Default Threshold Values are the maximum values that each
parameter can attain.
The Current Cumulative Values are the values computed since
the last reset of the device (either via power-cycle, BUS DEVICE
RESET, or SCSI RESET.
The Default Cumulative Values are the values to which each
parameter is initialized at a reset condition. Default values are
zero.
By default, Current Threshold Values = Default Threshold Values.
Note that all types of parameter values are changeable via LOG
SELECT.
LP List Parameter. This bit should always be set to 0 to indicate
parameter codes are treated as data counters.
Parameter Length This field specifies the number of bytes of the parameter value.
Parameter Value This field indicates the actual value of this log parameter.
5.7.4 Error Detection Summary in Log Select Pages
The host issues a LOG SENSE command to initialize host-resident software that allows
determination of:
The log pages used by the drive
The parameter codes and length of each parameter
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