User Manual

SCSI Commands Reference Manual, Rev. J 265
www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)
The function of this command and the meaning of fields within the CDB depend on the contents of the MODE field. The MODE
field is defined in table 228.
Table 228 WRITE BUFFER MODE field
Mode Description
00h
Combined header and data [a]
01h
Not supported
02h
Data
04h
Download microcode and activate
05h
Download microcode, save and activate
06h
Download microcode with offsets [b] and activate
07h
Download microcode with offsets [b], save, and activate
08h - 09h
Reserved
0Ah
Echo buffer
0Bh - 0Ch
Reserved
0Dh
Download microcode with offsets, select activation events, save, and defer activate
0Eh
Download microcode with offsets, save, and defer active
0Fh
Activate deferred microcode
10h - 19h
Reserved
1Ah
Enable expander communications protocol and Echo buffer
1Bh
Disable expander communications protocol
1Ch
Download application log
1Dh - 1Fh
Reserved
[a] Mode 00h is not recommended.
[b] When downloading microcode with buffer offsets, the WRITE BUFFER command mode should be 06h or 07h.