************************************************************************
**                    User's Manual for the Device Driver             **
**                                                                    **
**                         SCSI MO Device Driver                      **
**                                for DOS                             **
**                                                                    **
**                     MODISK2.SYS    Version 1.84                    **
**                                                                    **
**                                        (Revised: January 25, 1999) **
************************************************************************
     All Rights Reserved, Copyright (C) FUJITSU LIMITED 1996-1999


Table of Contents
=================
1. Preface

2. Outline of the Device Driver : MODISK2.SYS
  2.1  Functional overview
  2.2  Operating environment (hardware)
  2.3  Operating environment (software)
  2.4  Supported physical formats of MO disks
  2.5  Supported logical formats of MO disks

3.  Details of Device Driver : MODISK2.SYS
  3.1  Syntax
  3.2  Drive letter assignment
  3.3  Software configuration

4.Trademarks


1. Preface
==========
Thank you for purchasing Fujitsu's magneto-optical (MO) disk drive.
This Device driver support MO drives shown below.
    FUJITSU M251*
    FUJITSU MC*3***SS
    FUJITSU MD*3***SS


2. Outline of the Device Driver
===============================
2.1  Functional overview
------------------------
The device driver supports Read/Write and disk change of SCSI MO drives in
the DOS environment.

2.2  Operating environment (hardware)
-------------------------------------
The following hardware is necessary for the operation of this device driver:
1) IBM PC/AT or compatible.
2) SCSI host adapter card (SCSI board)
3) Fujitsu MO drive

[Notes]
1)Boot drive(DOS starts up from which) is not mounted.
2)SCSI drive which is registered to the BIOS of SCSI board is not mounted.

2.3  Operating environment (software)
-------------------------------------
1) DOS version 6 or later
2) ASPI manager for SCSI host adapter

   An ASPI manager is usually bundled with the SCSI board.
   To install the ASPI manager, refer to the manual of the SCSI board.

2.4  Supported physical formats of MO disks
-------------------------------------------
3.5-inch MO disks
1) 128 Mbytes total size, 512 bytes per sector
2) 230 Mbytes total size, 512 bytes per sector
3) 540 Mbytes total size, 512 bytes per sector
4) 640 Mbytes total size, 2048 bytes per sector
5) 1.3 Gbytes total size, 2048 bytes per sector

2.5  Supported logical formats of MO disks
------------------------------------------
(1) Volume format 

The device driver automatically detects the following three types of format 
and assigns logical drive letters (such as D: or E:).

(a) Super floppy format
  A standard MO format used with MS-DOS. 
  The entire disk is handled as one logical drive. 
  This format is generally called the IBM format.
  Use the attached FJFDISK program to make this format.

(b) AT hard disk format
  A format used with hard disks for PC/AT compatibles. 
  Use the attached FJFDISK program or the FDISK command of DOS to make this 
  format.

(c) NSR format (NSR volume format) (*)
  An international standard (ISO13346) that divides an optical disk into 
  multiple partitions. 
  One MO disk can be divided into multiple partitions (logical drives).
  NSR is an acronym for ISO13346 and stands for Non-Sequential Recording.
  Use the attached FJFDISK program to make this format.

(*)The device driver supports only Read/Write for NSR format.
   Cannot use the attached FJFDISK program to make NSR format.

[Note]
The driver assumes an unformatted MO disk if the MO disk is in any other 
format or has no valid partition.

(2) File format in each partition (file system)
- FAT (file allocation table)

  The FAT file system is used by DOS, and is supported by Windows 95, 
  Windows NT, and OS/2.


3.  Details of Device Driver
============================
3.1  Syntax
-----------
Register the device driver in the CONFIG.SYS file as described below. 
The description is not case-sensitive.

DEVICE=(path)\MODISK2.SYS [/P][/Ii][/Rr]
or
DEVICEHIGH=(path)\MODISK2.SYS [/P][/Ii][/Rr]

 /P   Pause option
      Pauses screen messages after the device driver is initialized during the 
      computer starting process.
      Pressing any key continues the operation.
      Specify this option in order to check the message displayed by the 
      device driver.

 /Ii  Device number option
      Only the device with SCSI ID i is mounted.
      To specify the host adapter number together, type /Ih:i (h is the host
      adapter number and i is the SCS-ID).
      To specify multiple devices, use the "+" character as a delimiter. 
      Example: /I0:1+1:2

      If this option is not specified, all ports are scanned.
      Therefore, this option need not be specified usually.

 /Rr  Reserved drive option
      Specify the number of reserved logical drive letters (r=1 to 10).
      If this option is not specified, one drive letter is reserved.
      The number of reserved drive letters (r) is independent of the number
      of disk partitions.


3.2  Drive letter assignment
----------------------------
(1) If the disk inserted upon starting the computer has more partitions than 
  the number specified with the /R option, as many drive letters as the number 
  of partitions are assigned to the MO drive.

  For example, if the /R2 option is specified in CONFIG.SYS and the computer 
  is started with a three-partition disk, three drive letters are assigned 
  to the MO drive.

(2) If a disk inserted in the MO drive has more partitions than the number of 
  drive letters assigned to the MO drive, the driver can access only as 
  many partitions as the number of drive letters assigned to the MO drive.

  For example, assume that two drive letters are assigned to the MO drive.
  If the MO disk with three-partitions is inserted, the driver cannot access 
  the third partition.

(3) If a disk inserted in the MO drive has fewer partitions than the number 
  of drive letters assigned to that drive, an error occurs when the driver 
  attempts to access the excess drive letter.

  For example, if two drive letters (D: and E:) are assigned to the MO drive.
  Then a single-partition disk is inserted, the driver can access that disk 
  using drive letter D:. However, if an attempt is made to access the disk 
  using drive letter E:, an error occurs and the "Invalid disk type" 
  message is displayed.

(4) Maximum number of drive letters
    This device driver assigns drive letters up to Y:. 
    If the number of drive letters specified with the /R option exceeds Y:, 
    the driver assigns drive letters up to Y:. 
    Similarly, if a disk with more partitions than Y: is inserted when 
    the computer is started, the driver assigns drive letters up to Y: 
    and ignores the rest of the partitions.

(5) Lastdrive specification
    The Lastdrive specification (LASTDRIVE=*) in CONFIG.SYS does not affect 
    the drive letter assignment of the MO drive.
    For example, if LASTDRIVE=H: is specified, drive letters I: and later 
    can be assigned by specifying a large value for the /R option.

(6) Drive letters for CD-ROM drives
    If this driver assigns a later drive letter than the drive letter 
    specified by LASTDRIVE=* (default is E:) in CONFIG.SYS, no drive 
    letter can be assigned to a CD-ROM drive. 
    In such a case, the CD-ROM drive cannot be accessed. 
    To solve this problem, increase the value specified for LASTDRIVE=.


3.3  Software configuration
---------------------------
This device driver accesses MO drives using the ASPI manager functions.
The figure below shows the software configuration of the device driver.

         +--------------------------+
         | DOS (Version 5 or later) |
         +--------------------------+
                     |
         +--------------------------+
         |     MODISK2.SYS          |
         +--------------------------+
                     |
               (SCSI Command)
                     |
         +--------------------------+
         |     ASPI Manager         |
         +--------------------------+
                     |
         +--------------------------+
         |      SCSI MO drive       |
         +--------------------------+


4. Trademarks
=============
No part of this package may be reproduced in any form or by any means.
PC-AT are either registered trademark or trademark of 
International Business Machines Corporation.
MS-DOS is a registered trademark of Microsoft Corporation.
Other company names and product names are registered trademarks or trademarks
of their respective companies.
 