User Manual

SCSI Commands Reference Manual, Rev. J 225
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.50 STREAM CONTROL command
3.50.1 STREAM CONTROL command overview
The STREAM CONTROL command (see table 196) requests the device server to open a stream and return the stream identifier in
the return parameter data or close the stream specified in the STR_ID field in the CDB.
This command uses the SERVICE ACTION IN (16) CDB format (see
SBC-4 - Annex A.2).
OPERATION CODE field
The OPERATION CODE field contains the operation code of a command supported by the logical unit and shall be set to the value defined in
Table 196.
SERVICE ACTION field
The SERVICE ACTION field is defined in 2.2.2 and shall be set to the value in table 196.
STR_CTL and STR_ID fields
The stream control (STR_CTL) field specifies the operation to be performed as described in table 197.
If the STR_CTL field is set to 10b, then the stream identifier (STR_ID) field specifies the stream identifier associated with the requested opera-
tion. If the STR_CTL field is not set to 10b, then the device server shall ignore the STR_ID field.
Table 196 STREAM CONTROL command
Bit
Byte
7 6 5 4 3 2 1 0
0 OPERATION CODE (9Eh)
1 Reserved
STR_CLTL
SERVICE ACTION (14h)
2
Reserved
3
4 (MSB)
STR_ID
5 (LSB)
6
Reserved
. . .
14
15 CONTROL
Table 197 STR_CTL field
Code Description
01b
Open a stream and return the stream identifier in the ASSIGNED_STR_ID field in the returned parameter data.
10b
Close the stream associated with the STR_ID field.
All others
Reserved