User's Manual

DLT4000 SCSI Interface
8-36 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
Page Code Page Description
00h List of Supported Pages Page
02h Write Error Counter Page
03h Read Error Counter Page
07h Last n Errors Events Page
32h Compression ratio page
Figure 8-19 LOG SENSE Pages Supported
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 field contains 3, then only parameters 3, 4, and
5 are returned to the initiator. Similarly, if a page supports parameters 1, 3, and 6, and
the Parameter Pointer field contains 2, then only parameters 3 and 6 are returned to
the initiator.
If Parameter Pointer is larger than the highest numbered parameter on the page, then
the target will terminate the command with CHECK CONDITION status. The sense
key is set to ILLEGAL REQUEST and the additional sense code is set to INVALID
FIELD IN CDB.
_________________________NOTE ____________________________
Parameters within a page are always returned in ascending order
according to parameter code.
___________________________________________________________
Allocation Length
The Allocation Length field is used to inform the target how much space the initiator
has allocated for data. There must be sufficient space allocated for all the requested
data, otherwise the command will terminate with a CHECK CONDITION Status with
Sense Key of ILLEGAL REQUEST, and ASC of INVALID FIELD IN CDB.