Chapter 1 Introduction; Overview; Features - Sony RMO-S594 User Manual

Chapter 1 Introduction

Overview

Features

The RMO-S594-DW/S591-DW Magneto-Optical
Disk Unit has the following features:
• Magneto-optical technology enables repeated
writing and erasing of data on the disk.
• The disk unit automatically senses the type of
disk being inserted, enabling the free use of
both 650-Mbytes (594-Mbytes), 1.3-Gbytes
(1.2-Gbytes) and 2.6 Gbytes (2.3 Gbytes)disks
indifferently.
• Direct-Overwrite MO disks can be used. The
writing performance of this disk unit is 1.5 to
2.0 times faster than that of the earlier MO Disk
Unit.
• A maximum of 2.6 Gbytes (1,024 bytes/sector)
or 2.3 Gbytes (512 bytes/sector) of data can be
written on the two sides of a 5.25-inch magneto-
optical disk. This is equivalent to about 1600–
1800 times the capacity of a conventional 3.5-
inch floppy disk (2HD).
• Any disk conforming to the internationally
accepted CCS (continuous/composite servo) or
CCW (continuous composite write-once) format
can be used in this disk unit.
• This disk unit employs SCSI-2 (Small
Computer System Interface-2).
-1
• The 3,600 min (3,600 rpm) high-speed
spindle motor enables data transfer rates of
2.03 – 4.06 Mbytes/s (1,024 bytes/sector) or
1.78 – 3.56 Mbytes/s (512 bytes/sector).
• The low-profile, light-weight optical pick-up
yields average seek times of 25ms.
• Use of a highly reliable error correction code
(ECC) system keeps the error rate as low as
-12
10 .
• Optimum operation environment is provided
through use of a large, 4MB(S594-DW)/
1MB(S591-DW) buffer and optimized cache
control algorithm. (Write cache can be enabled
or disabled. For details, see "Setting the Disk
Unit's Functions" on page 11.)
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Chapter 1 Introduction