Tandberg Data SLR7-140 PROGRAMMER Manual page 187

ETC
TMC
LP
Parameter Length
Clean
BYTE BIT 7
n+0 Parameter Code = 0001h
n+1
n+2 DU
n+3 Parameter Length = 03h
n+4
 Head Cleaning Time
n+6
Table 13-38:
Parameter Code
DU
DS
TSD
ETC
Tandberg Data
An Enable Threshold Comparison (ETC) bit is always 0 and
indicates that the comparison will NOT be performed.
(Note: This bit can not be changed by the initiator)
The Threshold Met Criteria (TMC) field is not valid as
the ETC bit is 0 and can't be changed from it's default
value 11b.
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 01h to indicate that the counter is
1 bytes wide.
The Clean bit is normally 0, but if the magnetic head of
the Drive has to be cleaned the value of this field is
1
changed to 1 .
Head Cleaning Time Log Parameters
6 5
DS TSD
Head Cleaning Time Log Parameters
The Parameter Code is set to 0001h.
The Disable Update (DU) bit will normally be set to 0 to
indicate that the Drive is always free to update the
counter. If the counter reaches its maximum value
(FFFFFFh) the DU bit is set to 1 and cause the counter
to retain its maximum value until a successful cleaning
has been performed. When the cleaning is performed both
the DU bit and counter are cleared.
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.
1
The criteria for
performance and when the tape has traveled more than a pre-set
threshold since last cleaning.
13-40 Tandberg SLR Product Line SCSI Functional Specifications
4 3
ETC TMC
setting the Clean
Log Sense
2 1
R LP
bit are poor read/write
0