DOCUMENT:Q111679  22-FEB-1994  [W_NT]
TITLE   :Fujitsu M2511A Doesn't Recognize Disk Change
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
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SYMPTOMS
========

Windows NT fails to recognize a disk change in Fujitsu M2511A Magneto
Optical disk drive. The directory displayed is the same as the previous
disk.

CAUSE
=====

The disk drive is shipped with incorrect settings for proper operation with
Windows NT. The default settings do not recognize the Unit Attention signal
which is generated when an error or disk change occurs. The system ignores
this event and does not recognize disk changes.

RESOLUTION
==========

To allow the drive to operate correctly the drive switches must be
configured as follows:

There are two switch blocks, SW1 and SW2. SW1 has four switches and SW2 has
eight. SW2-3 and SW2-5 must be on and SW2-7 must be off in order for
Windows NT to recognize disk changes. In addition, the disk must be
partitioned with Disk Administrator as type FAT.

MORE INFORMATION
================

Switch SW1
----------

SW1 determines the SCSI ID. It has the following configurations:

   SCSI ID   SW1-2   SW1-3   SW1-4
   -------------------------------
   0         OFF     OFF     OFF
   1         OFF     OFF     ON
   2         OFF     ON      OFF
   3         OFF     ON      ON
   4         ON      OFF     OFF
   5         ON      OFF     ON
   6         ON      ON      OFF
   7         ON      ON      ON

NOTE: SW1-1 is not used and should remain in the off position.

Switch SW2
----------

SW2 has the following settings:

   SW2-1: SCSI Parity check (ON - Enabled*, OFF - Disabled)
   SW2-2: Synchronous Data Transfer (ON - Enabled, OFF - Disabled*)
   SW2-3: Device Type Selection (ON - Removable Magneto Optical Disk**,
          OFF - Fixed Disk - Non Removable*)
   SW2-4: Spindle Auto Stop Mode (ON - Spindle stops when idle*,
          OFF - Spindle always stays on)
   SW2-5: Page Code 1 Byte Parameter (ON - 10 byte parameter page length
          and 6 byte page length descriptor**, OFF - 6 byte parameter page
          length and 10 byte page length descriptor*)
   SW2-6: Factory Test Option (ON - Factory Test Mode, OFF - Normal
          Operation*)
   SW2-7: Report Unit Attention (ON - Do not report Unit Attention*,
          OFF - Report Unit Attention per ANSI Spec.**)
   SW2-8: Factory Diagnostic Setting (ON - Enable Sending Diagnostic,
          OFF - Disable Run/Receive Diagnostic*)

*Factory Settings
**Modification to factory defaults for proper operation under Windows NT
and Windows NT Advanced Server

Additional reference words: 3.10 howto stp MO
KBCategory:
KBSubCategory: hrdwr

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