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Quantum DLT 7000 Tape System 5-57
LOG SENSE Command (4Dh) (continued)
Table 5–29 Log Parameters for Read / Write Compression Ratio LOG SENSE Page Field
Descriptions (Parameter Codes 02h through 09h) (continued)
Field Name Description
DU Disable Update. Always 0.
DS Disable Save. Not supported. This bit always set to 1.
TSD Target Save Disable. Not supported. This bit always set to 1.
ETC Enable Threshold Comparison. Threshold checking is not supported on
this page. Always set to 0.
TMC Threshold Met Criteria. Always 0.
LP List Parameter. Always set to 0 (parameter codes treated as data counter).
Counter Value Parameter Codes 02h through 09h provide a count of the number of
bytes transferred since the current tape cartridge was inserted or since the
last time the counters were reset via a MODE SELECT command.
Parameter Codes 02h and 03h -- Report the count of bytes transferred
from the tape drive to the initiator. Parameter Code 02h reports the
number of full megabytes transferred; Parameter Code 03h reports the
number of bytes less than a full megabyte that have been transferred.
Multiplying the counter returned for Parameter Code 02h by 1,048,576
and then adding the value of the counter returned by Parameter Code
03h results in the actual total bytes transferred to the initiator.
Parameter Codes 04h and 05h -- Report the count of bytes transferred
from the tape drive to the buffer. Parameter Code 04h reports the number
of full megabytes transferred; Parameter Code 05h reports the number of
bytes less than a full megabyte that have been transferred. Multiplying
the counter returned for Parameter Code 04h by 1,048,576 and then
adding the value of the counter returned by Parameter Code 05h results
in the actual total bytes transferred from tape to the buffer.