User Manual

SCSI Commands Reference Manual, Rev. J 87
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.4.2 GET LBA STATUS parameter data
3.4.2.1 GET LBA STATUS parameter data overview
The GET LBA STATUS parameter data (see table 52) contains an eight-byte header followed by one or more LBA status
descriptors.
PARAMETER DATA LENGTH field
The PARAMETER DATA LENGTH field indicates the number of bytes of parameter data that follow. The value in the PARAMETER DATA LENGTH
field shall be:
a) at least 20 (i.e., the available parameter data shall contain at least one LBA status descriptor); and
b) four added to a multiple of 16 (i.e., the available parameter data shall end on a boundary between LBA Status descriptors).
Due to processing considerations outside the scope of this standard, two GET LBA STATUS commands with identical values in all CDB fields may
result in two different values in the PARAMETER DATA LENGTH field.
The relationship between the PARAMETER DATA LENGTH field and the ALLOCATION LENGTH field in the CDB is defined in SPC-5.
Table 52 GET LBA STATUS parameter data
Bit
Byte
7 6 5 4 3 2 1 0
0
PARAMETER DATA LENGTH (n-3). . .
3
4
Reserved. . .
7
LBA status descriptors
8 (MSB)
LBA status descriptor [first]. . .
23 (LSB)
. . .
n-15 (MSB)
LBA status descriptor [last]. . .
n (LSB)