
              Adaptec 7800 Family Manager Set v1.30 - Windows NT
              ==================================================
                   Driver v1.30 release for Windows NT v3.5x

Directory Structure:
--------------------

The files on this diskette which are required for the installation of
the 7800 series Windows NT drivers are as follows:

    \DISK1                  - Disk identifier file
    \TXTSETUP.OEM           - Install script used during NT installation
    \WINNT\3_5\AIC78XX.SYS  - 7800 series driver v1.30 for Windows NT v3.5x
    \WINNT\3_5\README.TXT   - This file
    \WINNT\3_5\OEMSETUP.INF - Install script used by Windows NT Setup


Installation instructions for the AIC-7870 Windows NT drivers:
--------------------------------------------------------------

Read this to find out about
===========================

    Installing and/or updating the 7800 Family driver for Windows NT
    Removing a host adapter
    Swapping a host adapter
    Information on restoring a configuration if Windows NT fails to boot

Installation Overview
=====================

This readme provides the information needed to install and use the Adaptec 
7800 Family Manager (driver) for Windows NT v3.5x. The 7800 Family driver
for Windows NT supports all Adaptec 7800 Family host adapters listed
below:

      AHA-2910      PCI-to-Fast SCSI (non-bootable)
      AHA-2940      PCI-to-Fast SCSI
      AHA-2940W     PCI-to-Fast and Wide Single-Ended SCSI
      AHA-2940U     PCI-to-Fast20 SCSI
      AHA-2940UW    PCI-to-Fast20 and Wide Single-Ended SCSI
      AHA-2944W     PCI-to-Fast and Wide Differential SCSI
      AHA-2940AU    PCI-to-Fast20 SCSI
      AHA-3940      MultiChannel PCI-to-Fast SCSI
      AHA-3940W     MultiChannel PCI-to-Fast and Wide SCSI
      AHA-3940U     MultiChannel PCI-to-Fast20 SCSI
      AHA-3940UW    MultiChannel PCI-to-Fast20 and Wide SCSI
      AIC-7850      Single-Chip PCI-to-Fast SCSI
      AIC-7855      Single-Chip PCI-to-Fast SCSI
      AIC-7860      Single-Chip PCI-to-Fast20 SCSI
      AIC-7870      Single-Chip PCI-to-Fast and Wide SCSI
      AIC-7880      Single-Chip PCI-to-Fast20 SCSI

The 7800 Family Manager Set diskette for Windows NT contains the files 
needed for driver installation. The Windows NT subdirectory (\winnt\3_5)
on the diskette contains the following files:

    aic78xx.sys  - Adaptec's 7800 Family driver for Windows NT
    oemsetup.inf - A file used by Windows NT Setup for driver installation
    readme.txt   - An ASCII text file describing the Adaptec 7800 Family
                   driver for Windows NT

If you are performing a first time Windows NT installation, see Installing 
Windows NT and the Driver (below) to begin driver installation. If Windows 
NT is already installed in your system, see Updating Windows NT with the 
Driver below.

Installing Windows NT and the Driver
====================================

This section describes how to install the aic78xx.sys driver at the same
time you install Windows NT v3.5x. If Windows NT v3.5x is already installed
and you wish to install or update the aic78xx.sys driver, see
Updating Windows NT with the Driver below.

Installing Windows NT v3.5x and the Driver
=========================================

An older version of the aic78xx.sys driver is embedded (included) in the 
Windows NT v3.5x installation disks (or CD) for Non Fast-20 Host Adapters such
as the AHA-2940, AHA-2940W, AHA-2910 or AHA-3940 etc (ie. host adapters without
the letters AU, U or UW at the end of the model number).
We recommend first installing the embedded driver by following the instructions
in your Windows NT v3.5x documentation for a normal Windows NT installation.
Once the Windows NT installation is complete, you can update the aic78xx.sys 
driver by following the instructions in Updating Windows NT with the Driver below.

The embedded aic78xx.sys driver does not support Fast-20 host adapters such as the 
AHA-2940AU, AHA-2940U, AHA-2940UW and AHA-3940U etc. (ie. host adapters WITH
the letters AU, U or UW at the end of the model number). You should update/install the
aic78xx.sys driver from this diskette before installing the Fast-20 host adapter
on your system.  See the instructions in Updating Windows NT with the Driver below.

Note: During a normal Windows NT installation, the 7800 Family host adapter 
is detected in your system and the embedded aic78xx.sys driver is 
automatically installed. 

If you are booting from a 7800 Family host adapter and you are unable to 
install the embedded aic78xx.sys driver by performing a Windows NT 
installation, then follow the instructions here to complete a fresh Windows 
NT installation and install the aic78xx.sys driver from the 7800 
Family Manager Set diskette for Windows NT.

Note: If your boot host adapter is the Adaptec AHA-2944W, you must complete 
the instructions in this section to install the aic78xx.sys driver.
You may install Windows NT from a floppy drive or from a CD-ROM drive; 
whichever you choose, make sure the hardware installation is completed 
prior to following these steps.

    1 If you choose to install Windows NT from a floppy drive, locate the 
      Windows NT Disk 1 for Floppy Installation.

      If you are installing from a CD-ROM drive, locate the Windows NT Setup 
      Disk 1 for CD-ROM Installation.

    2 Put the diskette into drive A (not drive B) and turn on your computer. 
      When prompted, insert Windows NT Disk 2.

    3 From the Welcome to Setup Screen, press Enter to set up -Windows NT.

    4 When prompted, select Custom setup.

      Note: If you select Express setup, the embedded aic78xx.sys driver 
      included with Windows NT will be loaded and not the most recent 
      version of driver available from the 7800 Family Manager Set diskette 
      for Windows NT.

    5 Press S to skip mass storage device detection. This allows you to 
      manually select the driver for your host adapter.

    6 Since mass storage device detection was skipped in the previous step, 
      Windows NT Setup displays none in the list of recognized devices. 
      Press S to configure additional SCSI adapters.

    7 From the list of additional SCSI adapters, expand the list, select 
      Other, and press Enter. (Requires disk provided by a hardware 
      manufacturer).

    8 Insert the Adaptec 7800 Family Manager Set diskette for Windows NT 
      into drive A and press Enter.

    9 The screen displays the adapter drivers supported on the diskette.
      The Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x driver is highlighted by
      default; press Enter.

    10 If you want to add other host adapters (that are not a part of the 
      7800 Family), do so at this time by repeating Step 7 for each 
      additional adapter and inserting the appropriate disk provided by the     
      hardware manufacturer. The Adaptec 7800 Family host adapters use the 
      same driver; it is not necessary to install the aic78xx.sys driver 
      again.
    11 Press Enter to continue with the Windows NT operating system setup. 
      Follow the instructions given onscreen and in the Windows NT 
      installation documentation.

Updating Windows NT with the Driver
===================================

This section describes how to update/install the aic78xx.sys driver if 
Windows NT 3.5x is already installed. If you are installing Windows NT
v3.5x for the first time, see Installing Windows NT and
the Driver above.

Updating Windows NT v3.5x
=========================

Follow these instructions only if Windows NT v3.5x is already installed.

    1 Select and start the Windows NT Setup program. (Its icon is usually 
      found in the Main program group.) There is a brief pause while Windows 
      NT Setup scans your hardware -configuration.

    2 Select the Options pull-down menu and then select Add/Remove SCSI 
      Adapters. The SCSI Adapter setup program displays a list of all host 
      adapters currently installed.

    3 Click the Add button to add another host adapter type to the list. A 
      list of additional SCSI adapters appears.

    4 Expand the list of additional SCSI adapters; select Other and press 
      Enter. (Requires disk provided by the hardware -manufacturer).

    5 Insert the Adaptec 7800 Family Manager Set diskette for Windows NT 
      into drive A; enter the following path to the installation files and 
      then click OK.

      a:\winnt\3_5

    6 The screen displays the adapter drivers supported on the -diskette. 
      The Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x driver is highlighted by
      default; click OK. The driver is added to the list of SCSI adapters.
    7 Select Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x from the list of SCSI
      adapters and click Install.

      At this point, Windows NT Setup checks to see if the specified driver 
      (in this example, aic78xx.sys) has already been copied to the system 
      disk.

    8 If the following message appears, click New to replace the existing 
      driver and skip to Step 10.

      The driver(s) for this SCSI Adapter are already on the system. Do you 
      want to use the currently installed driver(s) or install new one(s).
      If the following message appears, continue with Step 9:
      Please enter the full path to the Windows NT SCSI Adapter files

    9 Change the path to the directory (i.e., a:\winnt\3_5) with the desired 
      device driver, then click Continue.

      The device driver is copied to your system disk and the -Windows NT 
      configuration is updated so that the new device driver loads when 
      Windows NT reboots.

    10 When the installation is complete, Windows NT Setup again displays a
       list of currently installed host adapter types. Verify that the new 
       host adapter appears on the list; the string should look similar to 
       Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x

    11 Add other types of host adapters if necessary (see Step 4 above), or 
       click Close to exit the SCSI adapters portion of -Windows NT Setup, 
       and then close the program.

    12 When you see this message, click OK to exit:

       The changes you have made will not take effect until the computer is 
       restarted

       If this message does not appear, no changes have been made to the 
       Windows NT system configuration.
    13 Restart your computer and Windows NT. It is possible that some drive 
       letter assignments may change from the previous configuration.

Removing a Host Adapter
=======================

Removing a host adapter can be as simple as physically removing it from the 
slot when your computer is shut down. Windows NT boots and functions 
properly in this configuration, but a warning message is generated every 
time you boot Windows NT.

Caution: If you have removed a host adapter but still have other host 
adapters of the same type installed in your computer, do not use Windows NT 
Setup to remove the device driver.

To eliminate the warning message, you must update the Windows NT software 
configuration, as described in these steps:

    1 Select and start the Windows NT Setup program. There is a brief pause 
      while Windows NT Setup scans your hardware -configuration.

    2 Select the Options pull-down menu and then select Add/Remove SCSI 
      Adapters. The SCSI Adapter setup program displays a list of all host 
      adapters currently installed.

    3 Select the host adapter you want to remove and click the Remove 
      button. When the Windows NT Setup program asks you for confirmation, 
      click OK.

      Because SCSI device drivers are loaded during system bootup and 
      because they may be needed to load Windows NT itself, a screen may 
      appear warning you that Windows NT may not start if you remove the 
      SCSI adapter.

    4 If you are sure you are removing the correct host adapter type, click 
      OK.

    5 Return to Step 3 if you want to remove driver support for other types 
      of host adapters, or click Close to exit the SCSI adapters portion of 
      Windows NT Setup.

    6 Close the Windows NT Setup program. When the following message 
      appears, click OK to exit:

      The changes you have made will not take effect until the computer is 
      restarted.

      If this message does not appear, no changes have been made to the 
      Windows NT system configuration.

    7 Restart the computer.

      Note: Windows NT Setup does not delete the device driver from your 
      system disk; it only updates Windows NT software configuration 
      information so that the device driver is no longer loaded during 
      system bootup. 

Swapping a Host Adapter
=======================

Swapping one type of host adapter for another is similar to the procedure 
for adding a host adapter. The important distinction is that you make all 
software configuration changes while Windows NT is running and before you 
make the hardware changes.

    1 Install the driver for the new host adapter by following the steps in 
      Updating Windows NT with the Driver above.

It is not essential to remove the device driver for the host adapter you 
are replacing. Windows NT dynamically detects the absence or presence of 
host adapter hardware, and no problems should arise if you leave the 
existing device driver installed. You may remove the device driver later, 
after you have successfully rebooted Windows NT. However, if you leave the 
driver in, the system alerts you with an error message of the extra device 
driver every time you boot. See Removing a Host Adapter above.

    2 Once the new device driver is installed, shut down Windows NT and 
      replace the existing host adapter. 

    3 Restart your computer and Windows NT. It is possible that some drive 
      letter assignments may change from the previous configuration.

Note: For Windows NT v3.1 only: If the host adapter you are swapping 
controls the computer boot device, you must follow the additional steps 
in Updating the Boot Host Adapter above.


Miscellaneous Notes:
====================

1.  Disconnection disabled for tagged queuing drives

If disconnection is disabled under SCSISelect for a hard disk device, the
system may hang if the hard disk device supports tagged queuing.  It is
recommended to always enable disconnection for hard disk devices.  By default,
disconnaction is enabled so no action is required.  If for some unique
requirements disconnection has to be absolutely disabled for hard disk
devices, you can turn off tagged queue requests by editing the Windows NT
Registry.  You can do so by following these instructions:

    1 Select the File pull-down menu from the Program Manager and select Run.

    2 Enter REGEDT32 to run the Registry Editor.
   
    3 Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78xx.

    4 Create a key named Parameters by selecting Add Key from the Edit pull-down
      menu and entering "Parameters" (without quotations) in the edit-box for
      Key Name.  Leave the Class edit-box blank.
       
    5 Open Parameters and create a key named Device by selecting Add Key from 
      the Edit pull-down menu.  Enter "Device" (without quotations) in the Key
      Name edit-box. Leave the Class edit-box blank.
       
    6 Open Device. Select the Add Value option from the Edit pull-down menu.
      In the Value Name edit-box, enter "DisableTaggedQueuing" (without quotations).
      Select the Data Type REG_DWORD from the droplist combo box.

    7 Enter a Hex value of 1 as the Data in the edit-box.  
    
    8 Shutdown and restart Windows NT.
    
    9 Set Enable Disconnection to No for your particular device(s) in SCSISelect
      during bootup. (See your Host Adapter manual on how to use SCSISelect).
  

2.  Logical drive letter assignment changes between BIOS and NT

If the logical driver letters assigned by the BIOS change when the NT
operating system is running, it's not an error.  To preserve drive letter
assigments between BIOS and NT, run the NT disk administrator and choose
permanent drive letters assigments as an option.  NT will then preserve
logical driver letter assignments across boots and adapters.


3.  Multiple AHA-2940/AIC-78XX listing in the Select SCSI Adapter Option

After a successful update of the aic78xx.sys driver, you will see 
Adaptec AHA-294x/AIC 78xx (PCI) and Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x 
listed as choices for the Add/Remove SCSI Adapters selection of the pull-down 
menu Option of Windows NT Setup (described in Removing a Host Adapter, see above).
This behavior is due to differences between the embedded SCSI.INF file and the 
OEMSCSx.INF that was created when installing/updating the aic78xx.sys. Both of
these choices in the Select SCSI Adapter Option refer to the same host 7800
Family of adapter(s) installed in your system.  You can pick any one of the
selections when adding/removing the host adapter(s). 


Troubleshooting
===============

The boot manager for Windows NT contains recovery logic to allow you to 
return to the last known good configuration. If you have changed your host 
adapter configuration and Windows NT no longer boots, follow these steps to 
recover:

    1 Undo any hardware changes you have made to the computer since it was 
      last operational.

    2 Reboot the computer. Watch the display carefully during bootup. If the 
      following message appears, press the Spacebar and follow the 
      instructions on the screen to continue booting with the last known 
      good configuration:

      Press spacebar NOW to invoke the Last Known Good menu

    3 Once your computer is operational again, check all of the hardware and 
      software configuration changes you want to make. Look specifically for 
      conflicts with parts of the existing system configuration that are not 
      being changed.

If you cannot determine the source of the error, contact Adaptec Technical 
Support for assistance at the telephone numbers listed below.


Contacting Adaptec:
-------------------

    Technical Support:

       Automated Technical Support:      U.S. and Canada:  (800) 959-7274
       ----------------------------      International:    (408) 945-2550
          o  Interactive FAX Service
          o  On-line Questions & Answers         
   
       Live Technical Support:           U.S. , Canada &
       -----------------------           International:    (408) 934-7274
          o  M-F: 6:00am to 5:00pm 
             Pacific Standard Time

    Literature Hotline:                                    (800) 934-2766
       o M-F: 6:00am to 5:00PM Pacific Standard Time

    Software Ordering (U.S.A. and Canada):                 (800) 442-7274
       o M-F: 6:00am to 5:00pm Pacific Standard Time

    International Software Ordering:                       (408) 957-7274
       o M-F: 6:00am to 5:00pm Pacific Standard Time

    Bulletin Board Service (BBS):                          (408) 945-7727
       o 24 hours a day (up to 28800 bps, using 8 data bits,
         1 stop bit, no parity)

    CompuServe Support                                         GO ADAPTEC

    The Microsoft Network (MSN)                                GO ADAPTEC

    World-Wide Web                                 http://www.adaptec.com

    FTP (login as user "anonymous")                       ftp.adaptec.com

    Internet E-Mail support                           support@adaptec.com


