Log Sense Command Descriptor Block-Data Format; Log Sense Command Descriptor Block-Field Descriptions - Maxtor ATLAS 10K III Product Manual

SCSI Description
The Command Descriptor Block for the LOG SENSE command is shown in Table
5-45. Table 5-46 contains field descriptions.
T a b l e 5 - 4 5 LOG SENSE Command Descriptor Block-Data Format
$ K V
$ [ V G
0
1
2
3 – 4
5 – 6
7 – 8
9
T a b l e 5 - 4 6 LOG SENSE Command Descriptor Block-Field Descriptions
( K G N F
PPC
SP
PC
Page Code
Parameter Pointer
Allocation Length
5-38 Maxtor Atlas 10K III
  
Reserved
PC
The Parameter Pointer Control bit controls the type of parameters that can be
requested from the drive. This bit must be 0, indicating that all log parameters
for the specified page (subject to the allocation length specified) are returned
to the initiator.
The Save Pages bit specifies whether the parameters are to be saved. This
bit must be 0, indicating that no parameters are to be saved and are reset at
power-on or by a TARGET RESET.
The Page Control field defines the type of parameter values to be selected.
The field must be 01b indicating that the current values are to be returned.
Mode 11b (return default values) is not supported because all counters have
a default value of 0.
The value specified as the Page Code determines the page to be returned. Ta-
ble 5-44 contains a list of supported log pages and their page codes.
This field is related to the PPC field. This bit must be 0.
This specifies the number of bytes of data that the drive is allowed to pass
during the DATA IN phase. The requested page is truncated if its length ex-
ceeds the number of bytes specified in this field.
 
Operation Code (4Dh)
Page Code
Reserved
Parameter Pointer
Allocation Length
Control
& G U E T K R V K Q P
  
PPC SP