Quantum DLT1/VS80 SCSI, Interface Manual

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Chapter 4: SCSI Commands
4-60 July 2004 81-81276-01 Rev A01
4.9.9 TapeAlert Page (1Ch)
The TapeAlert Page specifies parameters that control the TapeAlert MODE SELECT configuration.
Figure 4-38. TapeAlert Page — Data Format
Bit
Byte
7 6 5 4 3 2 1 0
0 PS 0 Page Code (1Ch)
1 Page Length (0Ah)
2 Perf Reserved DExcpt Test Rsv’d LogErr
3 Reserved MRIE
4 - 7 Interval Timer
8 - 11 Report Count / Test Flag Number
Table 4-36.
TapeAlert Page — Field Descriptions
Field Name Description
Perf Performance. This bit must be 0, which indicates that the tape drive may incur
higher command overhead when processing some TapeAlert information
exception conditions.
DExcpt Disable Exceptions. This bit must be 1: The tape drive generates no TapeAlert
exception conditions. This is polled mode for TapeAlert.
Test TapeAlert Flag Test. This bit must be 0: The tape drive does not generate any false/
test informational exception conditions.
Note: The value returned in MODE SENSE is always 0.
LogErr Log Errors. This bit must be 0, which indicates that the logging of informational
exception conditions is specific. The tape drive reports the informational exception
condition when processing of such information is convenient for the tape drive.
Depending on resource availability within the tape drive, processing of
informational exceptions may be delayed until more processing time and memory
are available.
MRIE Method of Reporting Informational Exception. This bit must be 03h.
This field is ignored since the DExcpt bit is always 1, which is the polled mode for
TapeAlert. The value in MODE SENSE is always 03h.
Interval Timer This field is not supported and must be 0.
Report Count/Test Flag
Number This field is not supported and must be 0.