Reference Guide

Chapter 4 SCSI Commands
LOG SENSE Command (4Dh)
DLT-S4 Interface Reference Guide 68
Error Summary in LOG
SENSE
Command
Descriptor Block
4
The following conditions constitute errors the drive detects relating to the
LOG SENSE CDB. The drive terminates the command with CHECK
CONDITION
status, Sense Key set to ILLEGAL REQUEST, and Additional
Sense Code set to
INVALID FIELD IN CDB.
Error conditions occur when:
• The drive does not support the requested page.
• The parameter pointer is larger than the highest numbered parameter
on the page.
• The SP bit is set to 1.
07h LAST
n ERROR EVENTS Log Page (07h) page 73
0Ch Sequential Access Device Log Page (0Ch) page 75
0Dh Temperature Log Page (0Dh) page 77
18h SAS Phy Control and Discover Log Page (18h) page 79
2Eh TapeAlert Log Page (2Eh) page 83
33h Device Wellness Log Page (33h) page 88
38h General Purpose Non-Volatile Log Page (38h) page 91
3Eh Device Status Log Page (3Eh) page 93
Parameter Pointer The Parameter Pointer field allows the host to specify at which parameter within a
log page the requested data should begin. For example, if a page supports
parameters 0 through 5, and the Parameter Pointer contains 3, the drive returns
only parameters 3, 4, and 5. Similarly, if a page supports parameters 1, 3, and 6,
and the Parameter Pointer contains 2, the drive returns only parameters 3 and 6.
If the Parameter Pointer is larger than the highest numbered parameter on the
page, the drive terminates the command with
CHECK CONDITION status, Sense
Key set to
ILLEGAL REQUEST, and Additional Sense Code set to INVALID FIELD IN
CDB
.
Note: The drive always returns parameters within a page in ascending order according to
the parameter code.
Allocation Length Specifies the maximum number of bytes that the host allocated for returning data.
The host uses this field to limit the size of data transfers to its own internal buffer
size.
Field Description