Features; Performance - Fujitsu MCJ3230SS Product Manual

General Description

1.1 Features

This section describes the following drive features:
•

Performance

•
Reliability
•
Maintainability/operability
• Adaptability
• Interface
1.1.1 Performance
(1) Half-height standard 90 mm (3.5-inch) size (25.4 mm height)
The SCSI controller can be connected to the system SCSI bus. The controller
meets the specifications of the standard 25.4 mm height 90 mm
(3.5-inch) fixed disk drive form factor.
(2) 2.3 GB capacity
The optical disk drive conforms to the 2.3 GB GIGAMO standard. It also
supports read and write accesses to 128 MB, 230 MB, 540 MB, 640 MB, and 1.3
GB disks.
(3) High-speed data transfer
The optical disk drive supports a disk media rotational speed of 3,637 rpm when
using 2.3 GB disks. The device supports a rotational speed of 5,455 rpm (ZCAV)
when using a 128 MB, 230 MB, 540 MB, or 640 MB disks. When using 1.3 GB
disks, the optical disk drive supports ZCAV mode with a rotational speed of 3,637
rpm, and ZCLV mode that controls the speed at three levels: 3,637/4, 138/4,801
rpm, in accordance with the position of the optical head.
In ZCLV mode, the optical disk drive speeds up by detecting continuous accessing
of inner disk tracks to prevent a reduction of inner disk rotation.
For random accesses, the optical disk drive switches to ZCAV mode that is fixed
to 3,637 rpm to prevent access performance degradation.
In the disk unit, high-speed data transfers at rates of 4.62 to 8.26 MB/s (2.3 GB)
are realized. The maximum data transfer rate on the SCSI bus is 20 MB/s in
synchronous transfer mode.
The SCSI bus high-speed data transfer capacity can be used effectively through
the optical disk unit's large capacity data buffer.
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