Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 174

Command Specifications
(2) Mode = 0, 0, 0, 1: Header + data, with address specification
The format of data transferred from the INIT in this mode must be the same as in the case of Mode = 0,
0, 0, 0, and the 4-byte header (with zero specified in all its contents) must be added to them.
In this mode, the top address of the data buffer where the data transferred from the INIT are stored can
be specified in the "Buffer address" field in the CDB.
The "Transfer byte length" field in the CDB specifies the total number of bytes of data transferred by the
INIT. The transfer byte count specification includes the 4 bytes of the header. The IDD stores data
transferred from the INIT, in a length in which the number of bytes in the header has been deleted from
the data ("Transfer byte length" – 4 bytes) in the data buffer beginning at the byte position specified in
the "Buffer address" field in the CDB.
Furthermore, a value less than the ["IDD's buffer size" – value specified in the "Buffer address" field – 4
bytes] must be specified in the "Transfer byte length" field in the CDB. When a value larger than that is
specified, data transfer is not executed with the INIT. Also, when zero is specified in the "Transfer byte
length" field, this command is terminated without data transfer being executed.
(3) Mode = 0, 0, 1, 0: Data only, with address specification
In this mode, data transfer from the INIT includes buffer data only without the 4-byte header being
added.
The top address of the data buffer where the data transferred from the INIT are to be stored can be
specified in the "Buffer address" field.
The "Transfer byte length" field in the CDB specifies the total number of bytes of data transferred by the
INIT. The IDD stores data transferred from the INIT in the data buffer beginning at the byte position
specified in the "Buffer address" field in the CDB.
Furthermore, a value less than the ["IDD's buffer size" – value specified in the "Buffer address" field]
must be specified in the "Transfer byte length" field in the CDB. When a value larger than that is
specified, data transfer is not executed with the INIT. Also, when zero is specified in the "Transfer byte
length" field, this command is terminated without data transfer being executed.
(4) Mode = 0, 1, 0, 0: Microcode download, without saving
In this mode, the controller's microcode or control information is transferred to the IDD's control
memory area. "0" must be specified in the "Buffer ID" field and the "Buffer address" field.
The "Transfer byte length" field specifies the total number of transfer bytes of data transferred from the
INIT.
When downloading of microcode is completed, the IDD generates a UNIT ATTENTION condition for
all the INITs. At this time, the IDD performs microprogram reboot and generates additional sense code.
The IDD operates according to this microcode until its power is switched off. If the power is switched
on again, the IDD's operation returns to the existing microcode saved previously on the disk.
3-112 C141-C010