User Manual

SCSI Commands Reference Manual, Rev. J 264
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
3.70 WRITE BUFFER command
3.70.1 WRITE BUFFER command introduction
The WRITE BUFFER command (see table 227) is used in conjunction with the READ BUFFER command for:
a) testing logical unit buffer memory;
b) testing the integrity of the service delivery subsystem;
c) downloading microcode; and
d) downloading application client error history (see SPC-5).
This command shall not alter any medium of the logical unit when the data mode or the combined header and data mode is
specified.
Table 227 WRITE BUFFER command
Bit
Byte
7 6 5 4 3 2 1 0
0
OPERATION CODE (3Bh)
1
MODE SPECIFIC MODE
2
BUFFER ID
3
(MSB)
BUFFER OFFSET
. . .
5
(LSB)
6
(MSB)
PARAMETER LIST LENGTH
. . .
8
(LSB)
9
CONTROL