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   Adaptec EZ-SCSI 5.0 Standard Edition 95/NT Drivers Information 
                       
            (c) Copyright Adaptec, Inc.  1995-1998

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Welcome to Adaptec EZ-SCSI Standard Edition v5.0 
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This readme contains information on the following for
Windows 95 and NT:


   A.) Help on installing Windows 95 from a SCSI CD-ROM
   B.) Help on installing NT on a SCSI hard drive
   C.) Installing Host Adapter Drivers (also called miniports)
   D.) Specific Host Adapter Driver Tips
 


A.) Help on Installing Windows 95 from a SCSI CD-ROM
====================================================

   1. Install EZ-SCSI for DOS from the EZ-SCSI for DOS/Win 3.1x
      diskette. All the drivers needed to access your CD-ROM drive will
      be loaded in config.sys, and you will be able to install Windows 95.

   (This of course assumes you had DOS already loaded on your
   system so that EZ-SCSI could load MSCDEX. If this file
   is not available you will be prompted for it by EZ-SCSI)

   2. Take note of the lines containing aspi*dos.sys and aspicd.sys
   in config.sys, and MSCDEX in autoexec.bat.
   
   3. Install Windows 95

   4. Say yes when it asks you should it create an emergency
   repair diskette for you. 

   5. When installation is complete you should copy the lines 
   noted in step 2 above into config.sys and autoexec.bat
   on this emergency diskette. This disk will allow you to
   reboot your system in an emergency and access your CD-ROM to 
   restore Windows 95.

B.) Help on Installing NT on a SCSI hard drive
==============================================
If you do a floppyless install of NT 3.51 from 
your SCSI CD-ROM using winnt /b, you may run into
a blue screen the first time the NT Installer
reboots your system. The reason for this is the
installer cannot find your SCSI hard drive.
You must reboot again, and just after the banner for
NT appears, you have 2 seconds within which to
press F6. This will pop up the screen that allows
you to specify your SCSI host adapter. You should 
specify Other and insert the EZ-SCSI Drivers Disk 
when prompted. Then continue with the rest
of the installation.
   
This trick is also useful if you want NT to use the host adapter
driver provided on the EZ-SCSI Drivers Disk instead of the older
drivers included in the O/S.

C.) Installing Host Adapter Drivers (also called miniports)
===========================================================

What is a SCSI miniport?  A SCSI miniport is a device driver that 
controls your SCSI host adapter.  For example, if you are running 
Windows 95 with an Adaptec AHA-2940, the miniport driver you are 
using is named aic78xx.mpd.  Windows 95 and NT come with embedded 
drivers for most of Adaptec's host adapters. Included in disk 1 of
EZ-SCSI Standard Edition are newer Adaptec miniports.

=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-
Automatic Installation by EZ-SCSI
=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-
  
When you run the EZ-SCSI Installer from the disk 1, it will 
automatically determine if the miniport driver included on disk 1 
is newer than what you already have installed on your system.  
If it is, your installed miniport driver will be automatically updated 
with the newer version.  After EZ-SCSI completes its installation it 
will reboot your computer.  Upon reboot, if your system doesn't yet 
see your host adapter, you will need to take one of the following sets 
of steps, to complete the installation of the miniport driver on your 
system. The usual cause of this is a non plug and play host adapter, 
or a non plug and play OS, such as NT 3.51 or 4.0.

   Additional Steps when Plug and Play doesn't work
   ------------------------------------------------

   Windows 95 
   
   1.) Open Control Panel
   2.) Click on the "Add New Hardware" icon
   3.) Select "No" when Windows asks if you would like it to search
       for new hardware
   4.) Select SCSI Controllers from the list of devices 
   5.) Insert the Win95/NT Drivers Disk 
   6.) Click the "Have Disk" button.
   7.) Select your Adaptec SCSI Host Adapter from the list to
       complete installation

   
   Windows NT 3.51
   
   1.) Open the Main program group
   2.) Click on the "Windows NT Setup" icon
   3.) Select "Add/Remove SCSI Adapters..."
   4.) Click on "Add..."   
   5.) Insert the Win95/NT Drivers Disk 
   6.) Click the "Have Disk" button.
   7.) Choose the Adaptec SCSI Host Adapter you wish to add


   Windows NT 4.0

   1.) Open Control Panel
   2.) Click on "SCSI Adapters"
   3.) Click on the "Drivers"
   4.) Click on "Add..." 
   5.) Insert the Win95/NT Drivers Disk 
   6.) Click the "Have Disk" button.
   7.) Select the Manufacturer and SCSI controller you wish to install

=-=-=-=-=-=-=-=-=-=--=-=-=-=-=
Manually Updating your Driver
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   Windows 95
   ----------

   If you would like to manually update your SCSI miniport driver,
   simply follow these steps:

   1.)  Run Device Manager.  You can do this by moving the mouse
        pointer over "My Computer," clicking the right mouse button, 
        and selecting the "Properties" menu option.
   2.)  Select the "Device Manager" option.
   3.)  Expand the "SCSI controllers" tree to view your SCSI host              
        adapter(s).
   4.)  Double-click on your SCSI host adapter.
   5.)  Select the "Driver" option.
   6.)  Select the "Change Driver..." option.
   7.)  Select the "Have Disk..." option.
   8.)  Enter your floppy drive letter (e.g. A:\) as the location to
        copy the manufacturer's files from.
   9.)  Insert the Adaptec EZ-SCSI Drivers Disk into your floppy drive
        and click "OK."
   10.) Select the name of your host adapter and click "OK."
   11.) Click "OK" and the driver will be copied to your hard drive.
   12.) You must restart your computer for the changes to take effect.
        Click "Yes" to restart your computer.  Click "No" to return 
        to the System Properties window.

   NOTE:  The miniports may be manually updated by simply copying them 
          to your Windows' IOSUBSYS subdirectory.  For example:

          C:\>copy a:\*.mpd c:\windows\system\iosubsys

   If you purchased the CD-ROM version of Windows 95, additional
   SCSIminiport drivers are located in the \Drivers\Storage directory 
   of your Windows 95 CD-ROM.

   Windows NT 3.51
   ---------------
   1.) Open the Main program group
   2.) Click on the "Windows NT Setup" icon
   3.) Select "Add/Remove SCSI Adapters..."
   4.) Select "Add..."
   5.) Press OK to continue
   6.) On the Select SCSI Adapter Option dialog, scroll through
       the list of Adapters to the end and select "Other (Requires..)" 
   7.) At the "Insert Disk" dialog box make sure you have 
       inserted the EZ-SCSI Drivers Disk into your floppy drive.
       Type a:\winnt and press OK.
   8.) Choose the host adapter you wish to add from the list in the 
      "Select OEM Option", and follow the rest of the dialogs.
   9.) You must restart your computer for the changes to take effect.


D.) Specific Host Adapter Driver Tips
=====================================

   The following information is for the Adaptec PCI SCSI Host Adapter family
   of product:

   The following Adaptec SCSI Host Adapters, except those indicated with an
   asterisk, are supported with the aic78xx.mpd driver. The Ultra2 SCSI host
   adapters marked with an asterisk are supported with the aic78u2.mpd driver.

   Adaptec Host Adapter   Description
   --------------------   -----------
   AVA-2902I              PCI-to-Fast SCSI (non-bootable, internal)
   AVA-2902E              PCI-to-Fast SCSI (non-bootable, external)
   AVA-2904               PCI-to-Fast SCSI (non-bootable)
   AHA-2910               PCI-to-Fast SCSI (non-bootable)
   AHA-2930               PCI-to-Fast SCSI
   AHA-2940               PCI-to-Fast SCSI
   AHA-2940W              PCI-to-Fast and Wide Single-ended SCSI
   AHA-2940AU             PCI-to-Ultra Single-ended SCSI
   AHA-2940U              PCI-to-Ultra Single-ended SCSI
   AHA-2940U Dual         DualChannel PCI-to-Ultra Wide Internal Single-ended
                          with 50-pin external connector
   AHA-2940UW             PCI-to-Ultra Wide Single-ended SCSI
   AHA-2940UW Dual        DualChannel PCI-to-Ultra Wide Single-ended SCSI
                          with Wide external connector
 * AHA-2940U2W            PCI-to-Ultra2 Wide LVD/Single-ended SCSI
   AHA-2944W              PCI-to-Fast and Wide Differential SCSI
   AHA-2944UW             PCI-to-Ultra Wide Differential SCSI

   AHA-3940               MultiChannel PCI-to-Fast SCSI
   AHA-3940W              MultiChannel PCI-to-Fast and Wide SCSI
   AHA-3940U              MultiChannel PCI-to-Ultra SCSI
   AHA-3940UW             MultiChannel PCI-to-Ultra Wide SCSI
   AHA-3940UWD            MultiChannel PCI-to-Ultra Wide SCSI with dual
                          external connectors
   AHA-3944UWD            MultiChannel PCI-to-Ultra Wide Differential SCSI
                          with dual external connectors
   AHA-3940AU             MultiChannel PCI-to-Ultra SCSI
   AHA-3940AUW            MultiChannel PCI-to-Ultra Wide SCSI
   AHA-3940AUWD           MultiChannel PCI-to-Ultra Wide SCSI with dual
                          external connectors
   AHA-3944AUWD           MultiChannel PCI-to-Ultra Wide Differential SCSI
                          with dual external connectors

   AHA-4944W              Quad Channel PCI-to-Fast and Wide Differential SCSI
   AHA-4944UW             Quad Channel PCI-to-Ultra Wide Differential SCSI

   AIC-7850               Single-chip PCI-to-Fast SCSI
   AIC-7855               Single-chip PCI-to-Fast SCSI
   AIC-7856               Single-chip PCI-to-Fast SCSI
   AIC-7860               Single-chip PCI-to-Ultra SCSI
   AIC-7870               Single-chip PCI-to-Fast and Wide SCSI
   AIC-7880               Single-chip PCI-to-Ultra Wide SCSI
 * AIC-7890               Single-chip PCI-to-Ultra2 Wide SCSI
   AIC-7895               Single-chip PCI-to-MultiChannel Ultra Wide SCSI



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   Known Issues for Windows 95
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    o The mapping between mscdex, which runs in real mode, and the
      Windows 95 CD-ROM driver does not match.  You can correct this in
      one of two ways:

      1 Comment out the line that loads mscdex.exe in the autoexec.bat
        file.

      2 Change the /L switch on the line that loads mscdex.exe in the
        autoexec.bat file so it assigns the CD-ROM drive the next highest
        logical drive letter after the hard disk drives.

    o Windows 95 does not support sharing of system interrupts (also
      known as IRQ's) between two or more I/O subsystem devices (i.e.
      network interface cards or hard disk adapters such as SCSI host
      adapters). When IRQ's are shared between I/O devices, lockups can
      occur while booting. If lockups occur, try moving or removing one
      or more PCI cards from one slot to another and bootup your computer
      again.  If problems continue, refer to your system documentation
      and/or your system technical support for information on adding
      your system configuration. 

    o In some cases, each channel of a MultiChannel adapter must be 
      updated/installed manually with the aic78xx.mpd driver on a 
      freshly installed Windows 95 system. Please follow the
      instructions listed under "Manually Updating your Driver" for each
      channel.

   =-=-=-=-=-=-=-=-=-=-=-=-=-=
   Known Issues for Windows NT
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    o For Windows NT v3.5x, the embedded (included) miniport driver on the
      NT CD-ROM or diskettes, does not include support for Ultra host
      adapters (i.e., host adapters with the letters AU, U, UW, AUW, and
      AUWD at the end of the model number) and AHA-2944W.  Refer to the
      installation instructions in section d) above.

    o For Windows NT v4.0, upto and including Service Pack 3, the embedded
      (included) miniport driver on the CD-ROM does not include support
      for AHA-3940AUWD, AHA-3944AUWD, or AHA-4944W. Refer to the
      installation instructions section d) above.

    o An issue exists in Windows NT 3.5x with the Windows NT Setup
      Application.  In the Add/Remove SCSI Adapters selection, under the
      Options pull-down menu, you should see:

      "Adaptec AHA-294x/AHA-394x/AHA-4944 or AIC-78xx PCI SCSI Controller
         (NT 3.5x)"

      and possibly one or more of the following

      "Adaptec AHA-294x/AIC-78xx (PCI)"
      "Adaptec AHA-2940/AIC-78xx (PCI) NT v3.5x"
      "Adaptec PCI SCSI Controller(NT 3.5) AHA-290x/291x/294x/394x/4944/AIC-78xx"

      as listed choices.  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. All of these choices, refer to
      the same Adaptec aic78xx.sys driver in your system.
      Removing any one of them, without the intention of either replacing
      or upgrading, may result in your system failing to boot.

    o 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, disconnection 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 Run from the File pull-down menu (Windows NT 3.5x), or Run
        from the Start button (Windows NT 4.0).

      2 Enter REGEDT32 to run the Registry Editor.

      3 a. For non-Ultra2 host adapters:
         Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78xx.
        b. For Ultra2 host adapters:
         Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78u2.


      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_SZ from the
        droplist combo box.

      7 Shutdown and restart Windows NT.

      8 Set Enable Disconnection to No for your particular device(s) in
        SCSISelect during bootup. (See your Host Adapter manual on how to
        use SCSISelect).


    o 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 assignments between BIOS and NT, run the NT disk administrator
      and choose permanent drive letters assignments as an option.  NT will
      then preserve logical driver letter assignments across boots and
      adapters.

    o 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.

        Press spacebar NOW to invoke the Last Known Good menu

        Follow the instructions on the screen to continue booting with the
        last known good configuration.  For Windows NT 4.0 only, hit the
        letter "L", to switch to the last known good configuration.

      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.



   =-=-=-=-=-=-=-=-=-=-=-=-=-=-=
   NT SCSI Command Line Options
   =-=-=-=-=-=-=-=-=-=-=-=-=-=-=

   The following table shows driver-specific command line options:

   NAME                     DEFINITION                       VALID      DEFAULT
                                                             VALUES     VALUE
   -----------------------------------------------------------------------------
   MaximumSGList            Specify maximum number of        17 - 255    17
   (type=REG_DWORD)        scatter-gather elements
                            for Windows NT 4.0 only

   DisableTaggedQueuing     Disables Tagged Queueing         None
   (type=REG_SZ)


   To enter Windows NT SCSI-specific parameters, follow these steps:

      1 Select Run from the File pull-down menu (Windows NT 3.5x), or Run
        from the Start button (Windows NT 4.0).

      2 Enter REGEDT32 to run the Registry Editor.

      3 a. For non-Ultra2 host adapters:

           Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78xx.

        b. For Ultra2 host adapters:

           Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aic78u2.

      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.

        To specify a certain host adapter, append Device with the
        number of the host adapter.  For example, type Device0 for
        the first host adapter, Device1 for the second, etc.  If you
        omit the host adapter number, the configuration information
        applies to all host adapters supported bu aic78xx.sys or 
        aic78u2.sys.

      6 Open Device. Select the Add Value option from the Edit pull-down
        menu. In the Value Name edit-box, enter one of the valid parameter values.
        Make sure to enter the appropriate Data Type for the value.
        To enter additional values, repeat steps 5 and 6.

      7 Shutdown and restart Windows NT.

   =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
   Adaptec Driver Command Line Options
   =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

   The following table shows driver-specific command line options:

   NAME                     DEFINITION                       VALID      DEFAULT
                                                             VALUES     VALUE
   -----------------------------------------------------------------------------

   /MAXTAGS=nnn             Specify tagged command           1 - 255    128
   (type=REG_SZ)            queue depth

   To enter driver-specific parameters, follow these steps:

      1 Select Run from the File pull-down menu (Windows NT 3.5x), or Run
        from the Start button (Windows NT 4.0).

      2 Type regedt32 and press ENTER.

      3 Open the registry list to the following location:
        \HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\
        aic78xx\Parameters\Device\DriverParameters

        If the \Parameters\Device\DriverParameters key already exists,
        skip to step 10 below to begin entering parameters.  If the keys
        do not yet exist, you will need to create them by continuing with
        step 4.

      4 a. For non-Ultra2 host adapters:

           Click on the aic78xx key.

        b. For Ultra2 host adapters:

           Click on the aic78u2 key.

      5 Under the Edit pull-down menu, select Add Key.

      6 Type Parameters as the name for the new key, and then press ENTER.

      7 Click on the Parameters key.

      8 Under the Edit pull-down menu, select Add Key.

      9 Type Device as the name for the new key, and press ENTER.

        To specify a certain host adapter, append Device with the
        number of the host adapter.  For example, type Device0 for
        the first host adapter, Device1 for the second, etc.  If you
        omit the host adapter number, the configuration information
        applies to all 7800 Family host adapters.

     10 Click on the Device key.

     11 Under the Edit pull-down menu, select Add Value.

     12 Type DriverParameters as the name for the new key, and then
        press ENTER.  Make sure the Data Type is REG_SZ.

     13 A String Editor text box will appear, enter parameters in the
        text box.  When entering multiple parameters, each parameter
        must be separated by a space.


The following non-standard command line option is available for
AHA-2920 miniports in Windows 95 (FD16_700.MPD):

DisableSynchronousTransfers=d+ Where "d+" represents one or more 
decimal digits, each indicating a single  SCSI target ID.  
This option disables synchronous transfers (SDTR negotiation) on the 
indicated SCSI target IDs. For example:
   
DisableSynchronousTransfers=245 

turns off Synchronous Data Transfer Negotiations 
(and thus synchronous transfers) on SCSI target IDs 2, 4, and 5.

Adding options to Windows 95
   1.)  To add these options to the Windows 95 miniport driver, click
        the right mouse button once on the "My Computer" icon and select
        "Properties". This will bring up the System Properties dialog box. 
   2.)  Select the "Device Manager" tab.
   3.)  Open the "SCSI Controllers" sub-tree, and select the 
        "Future Domain PCI SCSI Host Adapter" branch.
   4.)  Click on the "Properties" button.
   5.)  Select the "Settings" tab.
   6.)  Type the desired options in the "Adapter Settings" edit box, 
        separating each option with a semi-colon (;).

You can also set other settings such as Disconnect Disable through the 
Settings Tab of the particular device whose properties you wish to 
alter. To disable the option, un-check the appropriate box in the 
Options group. To enable the option, check the appropriate box in the 
Options group.


The following non-standard command line options are available for 
AHA-2920 miniports in Windows NT 3.51 and higher (FD16_700.SYS):

   1.) Start the registry editor 
	From the Run command type x:\winnt\system32\regedt32.exe
	-where x is the drive where this directory is located.
        Open \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
   2.) Open the name of the particular miniport ("Fd16_700")
   3.) Create a key named "Parameters" using the 
       "Edit"-->"Add Key" command.
   4.) Open "Parameters" and create a key named "Device"
   5.) Open "Device"
   6.) 
      a) To disable synchronous transfers, perform the "Edit"-->"Add
         Value" command with the following information:
         Value Name:      DisableSynchronousTransfers
         Data Type:       REG_DWORD
         Value:           non-zero value to disable synchronous
                          transfer

      b) To disable disconnects, perform the "Edit"-->"Add Value"
         command with the following information:
         Value Name:      DisableDisconnects
         Data Type:	  REG_DWORD
         Value:	     	  non-zero value to disable disconnects
    
      c) To set the maximum LUN to be scanned, perform the
        "Edit"-->"Add Value" command with the following information:
         Value Name:      MaximumLogicalUnit
         Data Type:       REG_DWORD
         Value:           maximum LUN to scan up to (if one is entered,
                          only LUN 0 will be scanned)
      
      d) To use the AdapterScansUp parameter, perform the 
         "Edit"-->"Add Value" command with the following information:
         Value Name:      DriverParameter
         Data Type:       REG_SZ
         Value:           AdapterScansUp=1
   7.) Exit the registry Editor and reboot the system



