TANDBERG B DLTSAGE INTEGRATION Integration Manual - page 30
MAM Attributes and Diagnostic Information
A-2
October 2003
81-81201-01 Rev A01
A.2 LOG SENSing Tape Drive Conditions
The types of diagnostic and status information SDLT tape drives provide are organized into several
categories. These categories are based on the SCSI commands that retrieve information from the tape
drive.
A.2.1 LOG SENSE Command Pages
Table A-2.
LOG SENSE Command Pages and Descriptions
Log Page
Description
Read (03h) / Write (02h)
Error
This log page provides information about the number and types of write or read
errors the tape drive has encountered and how many times the tape drive has
applied its error correction algorithm. The information this page provides allows
DLTSage to calculate the error rates.
Last n Error Events (07h)
This log page stores the 32 most recent errors the tape drive reported. Unlike other
pages that report codes, this page reports the text associated with each error.
Temperature (0Dh)
This log page returns the operating temperature, in degrees Celsius, inside the tape
drive at the instant the tape drive receives the LOG SENSE command. This page
does not provide alerts of excessive temperature conditions, but rather, continuous
temperature monitoring.
TapeAlert (2Eh)
This log page reports the current status of the tape drive’s internal self-diagnostic
monitoring activity. The tape drive sets and clears the various TapeAlert flags as
operating conditions change. An application monitoring the tape drive should
typically request the TapeAlert page as follows:
•
Before any Write or Read operation
•
Following any Write or Read error the tape drive reports
•
When the tape drive reaches the end of the tape and continued Write or Read
activity on spanned media is required
•
Immediately following any Write or Read operation.
Read / Write Compression
(32h)
This log page provides detailed statistics about the current write or read operation,
including the number of bytes transferred, and the compression ratio applied to the
data set.
Device Status (3Eh)
This log page reports information about the tape drive, including tape drive
cleaning status and statistics, the current operating temperature, and the ID of the
media most recently loaded.