User Manual

SCSI Commands Reference Manual, Rev. J 90
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.5.1 GET STREAM STATUS parameter data
The GET STREAM STATUS parameter data (see table 56) contains an eight-byte header followed by zero or more stream status
descriptors.
PARAMETER DATA LENGTH field
The PARAMETER DATA LENGTH field shall contain the length in bytes of the stream list. The stream list length is the number of open streams in
the logical unit multiplied by eight. The contents of the STREAM LIST LENGTH field are not altered based on the allocation length.
Due to processing considerations outside the scope of this standard, two GET STREAM 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 CDB ALLOCATION LENGTH field is defined in 2.2.6.
NUMBER OF OPEN STREAMS field
The NUMBER OF OPEN STREAMS field indicates the number of streams that are currently open in the logical unit.
Table 56 GET STREAM STATUS parameter data
Bit
Byte
7 6 5 4 3 2 1 0
0
PARAMETER DATA LENGTH (n-7). . .
3
4
Reserved
5
6 (MSB)
NUMBER OF OPEN STREAMS
7 (LSB)
stream status descriptors
8 (MSB)
stream status descriptor [first]. . .
15 (LSB)
. . .
n-7 (MSB)
stream status descriptor [last]. . .
n (LSB)