Table of Contents
Advertisement
2
PRODUCT SPECIFICATION OUTLINE
This chapter describes the logical subjects of Product Specification.
Refer to the Product Specification for physical information which are not included
herein.
2.1
ADDRESSING
The host computer addresses the target logical unit (controller and drive) using the
methods described below.
(1) SCSI ID
The host computer addresses the SCSI controller by setting the SCSI ID bit of the
controller on the data bus.
SCSI IDs are assigned uniquely to each SCSI device (initiators and targets)
connected to the same SCSI bus.
(2) Logical unit number
The host computer can address a logical unit in one of the following ways :
· Specifying the logical unit in the logical unit number field of the IDENTIFY
message issued after the SELECTION phase.
· Specifying the logical unit in the logical unit number field in the Command
Descriptor Block (CDB).
Note : The controller ignores the CDB logical unit number field if the IDENTIFY
message was used.
2.2
DISK FORMAT
2.2.1 CYLINDER ALLOCATION
All cylinders on disks are assigned for the system area and the user area. The
system area is preserved for the controller's use and may not be accessible from
the host computer.
The system area is allocated on both outermost cylinders, and it contains the
following types of data ;
2 PRODUCT SPECIFICATION OUTLINE
OEM MANUAL:K6602924
Revision: 1 / Date: 2003.03.06
Page: 21 / 273
Advertisement
Table of Contents
