Preface
Message Out-Phase (issued by host computer)
INITIATED DEFECTED ERROR 05h
ABORT 06h
NO OPERATION 08h
MESSAGE PARITY ERROR 09h
BUS DEVICE DRIVER
3
0Ch
TERMINATE IO PROCESS 11h
IDENTIFY 80h - FFh
SYNCHRONOUS DATA TRANSFER REQUEST
4
01h
1.4 Address Format for Answering Occasion (MSF bit)
With some commands, it is possible to choose either Logical Block Address or MSF Format
with Address Field of answering data.
MSF bit
if “0” (FALSE), use Logical Block Address as CD-ROM Absolute Address or Track
Relative Address. If Track Relative Address, the MSF bit is indicated by 2s sequences.
if “1” (TRUE), MSF Format is used. Within the shift area, number declines by a positive
number.
1.5 Sample Command
The table on the opposite page outlines the command structure. Some commands apply to the
entire drive. For these commands only, the LUN will be ignored.
Commands with Logical Blocks, e.g. READ, VERIFY, have Allocation Length in Blocks. All
others have Allocation Length in bytes. Some commands use Transfer Length instead of
Allocation Length to specify the number of bytes that the initiator will transfer to the drive.
3
For equipment supporting Change Definition Command, the DRM/DR-U Series drives have a Hardware Reset Option. In this case, the
Change Definition chosen by the SCSI action definition would not be changed or initialized by either the SCSI BUS RESET or BUS
DEVICE RESET message.
4
From EXTEND MESSAGE (01h).
