Tandberg Data
SCSI Commands
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Tandberg SLR Autoloader SCSI Functional Specifications
2-9
2.4
LOG SENSE 4Dh
Bit
Byte
7
6
5
4
3
2
1
0
0
Operation Code (4Dh)
1
Logical Unit Number
Reserved
PPC
SP
2
PC
Page Code
3
Reserved
4
Reserved
5
Parameter Pointer (MSB)
6
Parameter Pointer (LSB)
7
Allocation Length (MSB)
8
Allocation Length (LSB)
9
Vendor Unique
Reserved
Flag
Link
The LOG SENSE command provides a means for the initiator to retrieve statistical
information maintained by the device.
PPC
The parameter pointer control (PPC) bit controls the type of parameters requested from
the target. A PPC bit of zero indicates that the log parameter requested shall begin with
the parameter code specified in the parameter pointer field and shall return the number
of bytes specified in the allocation length field in ascending order of parameter codes
from the specified log page. This bit should always be set to zero.
SP
A save parameters (SP) bit of zero indicates that parameters shall not be saved. This bit
should always be set to zero.
PC
The page control (PC) field specifies the type of parameter values to be selected:
PC
Parameter Value
01b
Cumulative values
All other PC values are not supported.
PAGE CODE
The page code field identifies which log page is being requested by the
initiator. Valid values are:
Page Code
Page Description
00h
List of supported pages
2Eh
TapeAlert Log Page
30h
System Trace Page
31h
System Log Page
32h
System Configuration Page