Tandberg Data
SCSI Commands
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2-10
Tandberg SLR Autoloader SCSI Functional Specifications
PARAMETER POINTER
The parameter pointer field allows the initiator to request parameter data
bytes beginning from a specific parameter code to the maximum allocation
length or maximum parameter code supported by the device, whichever is
less. Log parameters within the specified page shall be transferred in
ascending order according to parameter code. This field should always be set
to zero.
ALLOCATION LENGTH
The allocation length field specifies how much space the initiator has
allocated for returned data.
2.4.1
LOG SENSE Page Format
Log sense data is organized in pages. The data for only one page can be
transferred with any one LOG SENSE command. The Log Sense page
consists of a 4-byte page header followed by zero or more log parameters.
Each log parameter is made up of a 4-byte parameter header followed by
one or more associated parameter data bytes.
2.4.2
LOG SENSE Page Header Format
Each log page begins with a four-byte page header followed by zero or more
variable length log parameters defined for that page.
Bit
Byte
7
6
5
4
3
2
1
0
0
Reserved
Page Code
1
Reserved
2
Page Length (MSB)
3
Page Length (LSB)
4-n
Page-specific log parameter(s)
PAGE CODE
The page code field identifies which log page is being transferred.
PAGE LENGTH
The page length field specifies the length in bytes of the following log parameters. If the
initiator sends a page length that results in the truncation of any parameter, the target
shall terminate the command with CHECK CONDITION status. The sense key shall be
set to ILLEGAL REQUEST with the additional sense code set to INVALID FIELD IN
PARAMETER LIST.
