DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-39
4.8.7 Device Wellness LOG SENSE Page (33h)
This LOG SENSE page returns the data useful for determining the tape drive wellness. The page
contains up to 16 log entries (parameter code 0000h to 000Fh). Each entry records an error event
classified as recovered error (Sense Key is 1), medium error (Sense Key is 3), or hardware error (Sense
Key is 4). Parameter code (0000h) contains the oldest log information, while parameter code (000Fh)
contains the newest information.
N
OTE
:
The tape drive records only head cleaning recovered related errors—that
is, the more serious recovered errors—on the first category when Sense
Key is 1: It captures all error events associated with the Sense Key 3 or 4.
Counter Value
These parameter codes provide a count of the number of bytes transferred since the
current data cartridge was inserted or since the last time the counters were reset
with a MODE SELECT command.
Parameter codes 02 and 03 report the counts of bytes transferred from the tape
drive to the initiator. Parameter code 02 reports the number of full megabytes
transferred. Parameter code 03 reports the number of bytes less than a full
megabyte that have been transferred. Multiplying the counter returned for
parameter 02 by 1,048,576 and then adding the counter value returned for
parameter 03 gives the actual total bytes transferred to the initiator.
Parameter codes 04 and 05 report the counts of bytes transferred from the medium
to the buffer. Parameter code 04 reports the number of full megabytes transferred.
Parameter code 05 reports the number of bytes less than a full megabyte that have
been transferred. Multiplying the counter returned for parameter 04 by 1,048,576
and then adding the counter value returned for parameter 05 gives the actual total
bytes transferred from medium to buffer.
Parameter codes 06 and 07 report the counts of bytes transferred from the initiator
to the buffer. Parameter code 06 reports the number of full megabytes transferred.
Parameter code 07 reports the number of bytes less than a full megabyte that has
been transferred. Multiplying the counter returned for parameter 06 by 1,048,576
and then adding the counter value returned for parameter 07 will give the actual
total bytes transferred from the initiator to the buffer.
Parameter codes 08 and 09 report the counts of bytes written to the medium.
Parameter code 08 reports the number of full megabytes transferred. Parameter
code 09 reports the number of bytes less than a full megabyte that has been
transferred. Multiplying the counter returned for parameter 08 by 1,048,576 and
then adding the counter value returned for parameter 09 will give the actual total
bytes written to the medium.
Table 4-22.
Read / Write Bytes Transferred LOG SENSE Page — Field Descriptions
(Continued)
Field Name
Description
Содержание DLTtape DLT1
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