Tandberg Data SLR7-140 PROGRAMMER Manual page 175

BYTE BIT 7
n+0 Parameter Code = 0002h
n+1
n+2 DU
n+3 Parameter Length = 08h
n+4
 Read Media Blocks Counter
n+11
Table 13-27:
Parameter Code
DU
DS
TSD
ETC
TMC
LP
Parameter Length
Read Media Blocks
Counter
Tandberg Data
Read Media Block Counter Log Parameters
6 5
DS TSD
Read Media Block Counter Log Parameters
The Parameter Code is set to 0002h.
A Disable Update (DU) bit set to 0 indicates that the
Drive is free to update the counter.
A DU bit set to 1 indicates that the Drive shall not
update the counter except in response to a LOG SELECT
command that specifies a new value for the counter.
The initiator may use the LOG SELECT command to set or
clear the DU bit.
The Drive sets the DU bit to 1 when the counter reaches
its maximum value (FFFFFFFFFFFFFFFFh).
The Disable Save (DS) bit is set to 0 to indicate that
the Drive does support saving of this log parameter.
(Note: This bit can not be changed by the initiator)
The Target Save Disable (TSD) bit is set to 0. The Drive
will save this log parameter each time a cartridge is
unloaded.
(Note: This bit can not be changed by the initiator)
An Enable Threshold Comparison (ETC) bit indicates
whether comparison to the threshold value is performed
or not.
The default value is 0. See the LOG SELECT command for
further description.
The Threshold Met Criteria (TMC) field is valid only if
ETC bit is 1 and it selects one of four possible
Threshold Met Criteria.
The default value is 11b. See the LOG SELECT command for
further description.
The List Parameters (LP) bit is set to 0 to indicate
that the parameter is a data counter.
(Note: This bit can not be changed by the initiator)
This field is set to 08h to indicate that the counter is
8 bytes wide.
This counter counts blocks, read from the media, during
Read and Space operations. It is incremented by one on
the detection of each new physical block. The counter
will remain unchanged during Space reverse, Space EOD,
Fast Space or on Locate operations.
13-28 Tandberg SLR Product Line SCSI Functional Specifications
4 3
ETC TMC
Log Sense
2 1 0
R LP