WIN9598.TXT Driver File Contents (ackxw00.exe)

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                                  WIN9598.TXT 
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INSTALLATION GUIDE FOR THE SDMS DRIVERS: SYMC8XX.MPD V4.12.00
                                         SYM_HI.MPD  V4.12.00

This file describes the features and use of the Symbios SDMS device drivers
for the Windows 95/98 operating system environment. It is divided into the
following sections:

Introduction for Windows 95/98
     Features
     Symbios Devices Supported
     Description

Installing Your SYMC8XX.MPD/SYM_HI.MPD Driver(s)
     Preparing a Symbios Driver Diskette
     New System Installation
     Existing System Installation
     Existing System Using ASPI8XX.SYS DOS ASPI Driver
     Verifying Correct Driver Installation
     Command Line Options
     Troubleshooting

Important Additional Information
     Enabling/Disabling Ultra SCSI Support
     Disabling Auto Request Sense Support
     Enabling SCAM Support
     Multiple Symbios Host Adapter Considerations


************************ Introduction for Windows 95/98 ************************ 

Windows 95/98 is an operating system designed to run on Intel processors
using current technology. It provides a graphical user interface environment 
incorporating many high-level features (refer to the Microsoft Windows 95/98 
documentation for details). An I/O manager handles I/O requests in 
Windows 95/98.

To address a SCSI peripheral, the I/O manager goes through the appropriate
drivers. Class drivers for hard disk, floptical, CD-ROM, printer, and scanner
peripherals are provided in Windows 95/98. Other class drivers, provided by
peripheral manufacturers, are added to support new devices.

Symbios/Microsoft provide miniport drivers, called SYMC8XX.MPD and SYM_HI.MPD,
to complete the path to a Symbios controller or processor with an optional SDMS 
SCSI BIOS. The following sections describe these drivers and their installation.


*  *  *  *  *  *  *  *  *  *  * Features *  *  *  *  *  *  *  *  *  *  *  * 

o  Synchronous negotiation (including Fast/Ultra SCSI/Ultra2 SCSI) 
o  Wide negotiation 
o  Auto Request Sense 
o  Supports multiple host adapters 
o  Supports multiple Logical Unit Numbers (LUNs) 
o  Allows Disconnect/Reselect 
o  Supports Scatter-Gather 
o  Provides Differential Support 
o  Supports SCSI pass-through functionality 
o  SCAM Support (SCSI Configured AutoMatically) 
o  Target initiated negotiation support 
o  NVRAM support (wide/sync parameters, SCSI Host ID, SCAM on/off) 


*  *  *  *  *  *  *  *  Symbios Devices Supported *  *  *  *  *  *  *  *  * 

The SYMC8XX.MPD driver supports the following devices and Symbios host adapters
based on those devices:

o  SYM53C810, SYM53C810A, SYM53C810AE (SYM8100S, SYM8100ASP)
o  SYM53C815 (SYM815XS, SYM8150SP)
o  SYM53C825, SYM53C825A (SYM8250S, SYM8251S, SYM8251D, SYM8250ASP, SYM8251ASP,
   SYM8251AD)
o  SYM53C860, SYM53C860AE (SYM8600SP)
o  SYM53C875, SYM53C875E (SYM8750SP, SYM8751SP, SYM8751D)
o  SYM53C876 (SYM22801, SYM22802)
o  SYM53C885 
o  SYM53C895A 
o  SYM53C895, (SYM8951U)


The SYM_HI.MPD driver supports the following device and associated Symbios host
adapter:

o  SYM53C896 (SYM22910)


*  *  *  *  *  *  *  *  *  *  * Description *  *  *  *  *  *  *  *  *  *  *

SYMC8XX.MPD and SYM_HI.MPD are designed to Microsoft's specification for
miniport drivers. These drivers allow connection of SCSI devices including
disk drives, CD-ROMs, and tape drives for PCI-based machines. To support a new
SCSI device, the Windows 95/98 architecture requires that a class driver for
that type device is present (usually supplied by Microsoft, or possibly by the
peripheral manufacturer). No changes to SYMC8XX.MPD or SYM_HI.MPD are required.
These drivers are only supported under Windows 95/98. 

SCSI commands are passed directly from a Windows application to the SCSI 
devices by using the SCSI pass-through facility (refer to Microsoft
Windows 95/98 documentation for details). This facility allows applications to 
directly control and access SCSI devices by filling in a data structure and 
calling in to the port driver.

The SYMC8XX.MPD and SYM_HI.MPD drivers support Ultra SCSI protocol, providing
twice the raw data transfer rate of Fast SCSI for disk drives and Symbios host 
adapters that support Ultra SCSI. These drivers also support Ultra2 SCSI protocol,
providing quadruple the raw data transfer rate of Fast SCSI.

Caution: Ultra SCSI requires more stringent SCSI bus cabling setups than 
         Fast SCSI. Ultra2 SCSI requires low-voltage differential (LVD) 
         termination.


**************** Installing Your SYMC8XX.MPD/SYM_HI.MPD Driver **************** 

*  *  *  *  *  *  *  * Preparing a Symbios Driver Diskette *  *  *  *  *  * 

Copy the files listed below for the appropriate driver (supplied to you on
diskette) to the root directory of a clean floppy diskette, and use this
Symbios Driver diskette during installation.

For the SYMC8XX.MPD driver: SYMC8XX.MPD   
                            SYMC8XX.INF   

For the SYM_HI.MPD driver:  SYM_HI.MPD   
                            SYM_HI.INF   


*  *  *  *  *  *  *  *  *  New System Installation *  *  *  *  *  *  *  *  *

This procedure installs the SYMC8XX.MPD or SYM_HI.MPD driver onto a
Windows 95/98 system for all new system installations. Use this procedure when
initially upgrading to Windows 95/98. Windows 95/98 automatically adds the
driver to the registry and copies the driver to the appropriate directories.

NOTE: Some Symbios PCI SCSI host adapters are supported by a driver 
      bundled in Windows 95/98. For these adapters, the bundled driver is 
      automatically installed during Windows 95/98 Setup. To change to the 
      SYMC8XX.MPD driver or SYM_HI.MPD driver, follow the instructions under
      "Existing System Installation" after the Windows 95/98 installation 
      is completed.

1. Start the Windows 95/98 Setup according to the Microsoft instructions.

2. Setup enters the hardware detection phase after a system reboot. The "Setting 
   up Hardware" message box appears. If the message "Symbios PCI 
   SCSI Host Adapter" appears, then the host adapter supports the bundled 
   driver, and it installs automatically. After the Windows 95/98 installation 
   completes, the user can install the SYMC8XX.MPD and/or SYM_HI.MPD drivers
   according to the "Existing System Installation" instructions.

3. If the bundled driver does not support the host adapter, Setup displays 
   a New Hardware Found - PCI SCSI Bus Controller dialog box. Select "Driver 
   from disk provided by hardware manufacturer" and click OK.

   Note: If ASPI8XX.SYS (the Symbios SDMS 4.0 DOS ASPI driver) is loaded 
         when beginning the Windows 95/98 installation, no messages about 
         PCI SCSI Bus Controllers are displayed. The installation completes,
         but real-mode disk drivers are used. See the section below on 
         "Verifying Correct Driver Installation." To install the SYMC8XX.MPD
         or SYM_HI.MPD drivers, (which disable loading of the ASPI8XX.SYS driver
         under Windows 95/98) see the section on "Existing System Using 
         ASPI8XX.SYS DOS ASPI Driver" below. 

4. Insert the Symbios Driver diskette into drive A: (or B:) (the one prepared 
   in * Preparing a Symbios Driver Diskette *) and click OK. If using drive 
   B:, you must select it from the pick list.

5. Windows 95/98 automatically copies the appropriate driver files and rebuilds 
   its driver database.

6. A "System Settings Change" dialog box is displayed. Remove the diskette 
   from the drive and click Yes to restart the computer.

At this point, Windows 95/98 Setup completes and the new driver is operational. 
To verify this, see the section "Verifying Correct Driver Installation."


*  *  *  *  *  *  *  *  * Existing System Installation *  *  *  *  *  *  *  * 

This procedure installs the SYMC8XX.MPD or SYM_HI.MPD driver onto an existing
Windows 95/98 system. These instructions indicate where specific information
applies to Windows 95 or Windows 98.  Otherwise unless noted, the instructions
apply to both operating systems. Please review the steps below before beginning
the installation.

1. Boot Windows 95/98.

2. Click Start. Move to Settings, Control Panel, and click.

3. Double-click on the System icon.

4. Click on the Device Manager tab.

    Note: If the SCSI controllers entry, or the PCI Symbios C8XX SCSI 
          Host Adapter entry do not exist, the system is probably using the 
          ASPI8XX.SYS DOS ASPI driver. See the "Existing System Using
          ASPI8XX.SYS DOS ASPI Driver" section below.

5. Either double-click on the SCSI controllers entry, or click once on the 
   plus sign to the left of it.

6. Select the PCI Symbios C8XX SCSI Host Adapter entry. Click the 
   Properties button.

7. Click the Driver button. In Windows 95, the version of the currently active
   driver should display in the File details section.  In Windows 98, press the
   DRIVER FILE DETAILS button to get this information displayed.

   Note: In certain versions of Windows 95, the version of the active driver 
         appears as NOT available. This is an operating system issue and is
         fixed in later versions of Windows 95. To verify the version of the
         driver, click on the Properties field of the SYMC8XX.MPD file under 
         the Version tab. The MPD driver is generally found in the 
         \WINDOWS\SYSTEM\IOSUBSYS\ directory.

8. Click the Change Driver... button.

* * * * * For Windows 95 * * * * *

9. Even though you may have previously installed the SYMC8XX.MPD or SYM_HI.MPD
   drivers, click the Have Disk... button to install a newer version.

10. Insert the Symbios Driver diskette in drive A: (or B:) (the one prepared 
    in * Preparing a Symbios Driver Diskette *) and click OK. If using drive 
    B:, you must select it from the pick list.

11. The Select Device dialog box should display "Symbios 8xx PCI SCSI 
    Host Adapter," where 8xx matches the installed adapter. Click OK.

12. The Driver tab is updated to display the new driver files. To install 
    these driver files, click OK. (Do NOT click the Change Driver... button.) 
    The driver files are copied and a new driver database is built.

* * * * * For Windows 98 * * * * *

"Update Device Driver Wizard" starts and provides several windows with choices.
Follow the steps below to correctly install the device driver for Windows 98.

9.  After the Intro window appears, click on the NEXT button.

10. The Wizard provides a choice between having the Wizard search for a better
    driver than the one in use or displaying a list of drivers from a specific
    location.  Choose "search..." and click on the NEXT button.

11. The next window allows the user to specify which device(s) will be searched,
    such as a Floppy, CD-ROM, or specify a specific path.

    Mark "Floppy disk drive" only and click on the NEXT button.

12. The next window queries the user about utilizing the currently installed
    driver.

    Mark "Install one of the other drivers" and click on the 
    "View List" button.

13. Next, a list of drivers appears from the specified search devices and the
    currently installed driver. Highlight the driver of choice and click OK.

14. The previous window appears with the selected driver displayed as the driver
    to install.  Click on the NEXT button.

15. The next window displays the chosen driver along with reference to the 
    designated path to install it in.

16. The Wizard summary window appears. Click on the Finish button.

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Upon completion of the installation for WIN95/98, the "System Settings Change" 
dialog box appears. Remove the diskette from the drive and click on the Yes
choice to restart the computer.

At this point, the new driver is operational. To ensure the correct driver 
has been installed, see the section "Verifying Correct Driver Installation."


*    * Existing System Using ASPI8XX.SYS DOS ASPI Driver *    *

This procedure installs the SYMC8XX.MPD or SYM_HI.MPD drivers onto an existing
Windows 95/98 system which is using the ASPI8XX.SYS DOS ASPI driver. You can 
check this by using the Verifying Correct Driver Installation instructions
below.

1. Boot Windows 95/98.

2. Click Start. Move to Settings, Control Panel, and click.

3. Double-click on the System icon.

4. Click on the Device Manager tab.

5. Either double-click on the Other entry, or click once on the plus sign to 
   the left of it.

6. Select the PCI SCSI Bus Controller entry. Click the Properties button.

7. Click the Driver button. A message should state that no drivers are 
   installed for this device.

8. Click the Change Driver... button.

9. In the Select Hardware Type dialog box, select SCSI Controllers.

10. In the Select Device dialog box, click the Have Disk button.

11. Insert the Symbios Driver diskette in drive A: (or B:) (the one prepared 
    in * Preparing a Symbios Driver Diskette *) and click OK. If using drive 
    B:, you must select it from the pick list.

12. The Select Device dialog box should display "Symbios 8xx PCI SCSI 
    Host Adapter", where 8xx matches the installed adapter. Click OK.

13. The Driver tab is updated to display the new driver files. To install 
    these driver files, click OK. (Do NOT click the Change Driver... button.) 
    The driver files are copied and a new driver database is built.

14. The "System Settings Change" dialog box appears. Ignore the message 
    saying to turn off your computer and change hardware settings. Remove the 
    diskette from the drive and click Yes to shut down the computer. Press 
    Ctrl-Alt-Delete or the system reset button to restart the system. 

At this point, the new driver is operational. To verify this, see the section 
"Verifying Correct Driver Installation"


*  *  *  *  *  *  *  Verifying Correct Driver Installation *  *  *  *  *  * 

After installing/updating with the SYMC8XX.MPD or SYM_HI.MPD drivers, you
should verify proper operation of the driver.

1. Check that all devices on the SCSI bus are available via My Computer. 
   Double click on the My Computer icon. Check that all logical SCSI hard 
   drives and CD-ROM drives are shown.

2. Click on the Start button. Move to Settings, Control Panel, and click. Double 
   click on the System icon. Click the Device Manager tab. Check that no host 
   adapter appears with a yellow or red symbol under the SCSI controllers
   entry. If there is, continue with the steps below to help determine the
   problem.

3. Either double-click on the SCSI controllers entry, or click once on the 
   plus sign to the left of it. One entry for each host adapter installed in 
   the system appears. Select an entry, then click the Properties 
   button. The Device Status message should read "This device is working 
   properly." If any other messages appear, continue with the steps below to 
   get more information on the problem.

4. Click the Driver tab. For Windows 98, press Driver File Details. Two 
   entries should appear: one for the INF and one for the MPD file. The INF
   file does not contain embedded version information, so the File Details
   are all Not Available. Select the MPD file.  The file version of the driver
   is displayed.

5. Click Cancel to leave the Host Adapter Properties dialog box. Click on the 
   Performance tab. A list of performance attributes is displayed. Below the 
   list, you should see the message "Your system is configured for optimal 
   performance." If any other messages appear, select each message and click 
   the Details button. This provides more information on why the system is 
   not performing optimally and methods to correct the problem.

If no problems are encountered in the above steps, the new driver is operating
properly. Otherwise, consult the section on Troubleshooting for additional
information.


*  *  *  *  *  *  *  *  *  * Troubleshooting *  *  *  *  *  *  *  *  *  *  *

The following are some problems their suggested solutions:

*   *   * Problem *   *   *

During Installation, No SCSI Devices Are Found.

*   *   * Solution *   *   *

a. Ensure that all devices are powered on and terminated correctly.

b. Check that no devices have duplicate SCSI IDs.

c. Make sure INT A is assigned for the PCI slot(s) where your SCSI host 
   adapter(s) are installed.

d. Be sure that all devices appear properly in the display banner of the
   SDMS SCSI BIOS at boot time.

*   *   * Problem *   *   *

Problems With Ultra SCSI Devices Using Ultra SCSI Protocol.

*   *   * Solution *   *   *

a. If the system is configured with a Symbios host adapter that 
   supports Ultra SCSI, an Ultra SCSI device is on the SCSI bus, and Ultra 
   SCSI support by the SYMC8XX.MPD or SYM_HI.MPD driver is enabled,
   intermittent problems and possible system crashes can occur if the SCSI
   bus cable and terminators do not conform to the Ultra SCSI specification. 

b. If the system is bootable, disable Ultra SCSI support using the procedure 
   described below.

c. If the system is not bootable to Windows 95/98, hold down F8 when Starting 
   Windows 95/98... is displayed. At the menu, select Safe Mode. Once the
   system is booted, disable Ultra SCSI support using the procedure described
   below.

d. If the system operates properly without Ultra SCSI enabled, it is highly 
   likely that the SCSI bus cable and terminators are not configured 
   correctly for Ultra SCSI. See the Symbios host adapter hardware 
   manual for information on Ultra SCSI cabling requirements.

e. Verify that the devices appear with the proper value for speed in the SDMS
   SCSI BIOS banner at boot time. Please see Chapter 2, "SCSI BIOS," for 
   additional details.

*   *   * Problem *   *   *

Problems With Scanners

a. If a scanner is not operating properly (either the scanner is not found or 
   a SCSI interface error occurs during scanning), it is possible that the 
   third-party scanner drivers do not support the auto request sense feature 
   of Symbios host adapters. Disable the auto request sense feature as 
   described below and try the scanner operation again.


**************************** Command Line Options **************************** 

*  *  *  *  *  * Enabling/Disabling Ultra SCSI Support *  *  *  * 

Ultra SCSI support is controlled by settings in the adapter NVRAM. 
These settings can be viewed or changed via the Configuration Utility. During 
system boot, after the Symbios PCI BIOS banner, the message "Press Control-C 
to start Configuration Utility" appears for a few seconds. Press Control-C to 
start this utility.  

Select one of the adapters displayed, then "Device Selections". This shows 
the Sync Rate for each device and the selected adapter. To set a device to 
Ultra, the speed should be set to 20 MegaBytes/second (for width of 8) or 
40 MegaBytes/second (for width of 16). To disable Ultra, the speed should be 
no higher than 10 MegaBytes/second (for width of 8) or 20 MegaBytes/second
(for width of 16). If the speed of the adapter itself is changed, the speed 
for all devices will be set no higher than the adapter speed.


*  *  *   *  *  *  * Disabling Auto Request Sense Support *  *  *  *  *  *  * 

When the SYMC8XX.MPD and/or SYM_HI.MPD drivers are installed, support for auto
request sense is enabled. Auto request sense is a feature of the adapter where
certain device information is obtained automatically without system control,
thereby increasing overall performance. However, some third-party peripheral
drivers do not support the use of auto request sense, resulting in perceived
device failures. Therefore, to allow these devices to operate properly, the
auto request sense feature can be disabled using the Device Manager on a per 
adapter basis.

Use this procedure for disabling auto request sense support:

1. Click on the Start button. Move to Settings, Control Panel, and click. Double 
   click on the System icon. Click on the Device Manager tab.

2. Either double-click on the SCSI controllers entry, or click once on the 
   plus sign to the left of it. One entry for each host adapter installed in 
   the system appears. Select the adapter desired, then click on the 
   Properties button. Click the Settings tab.

3. In the Adapter settings entry, type "DisableAutoReqSense=1;", without 
   the quotes. If there is already an entry displayed, type the above at the 
   end of the existing entry. Be sure to include the semi-colon.

4. Click OK to exit the Settings tab.

5. Click OK again. If the entry was changed, the "System Settings Change" 
   dialog box is displayed. Click Yes to restart the computer.

After the system reboots, auto request sense is disabled for the 
selected adapter. To re-enable auto request sense, delete the entry that was 
made above. If other entries exist, be sure to leave them intact.


*  *  *  *  *  *  *  *  * Enabling SCAM Support *  *  *  *  *  *  *  *  *

SCAM (SCSI Configured AutoMatically) is a protocol that allows SCAM-compliant 
peripherals to assign their SCSI IDs dynamically at boot time, eliminating 
the need for the user to check and set unique SCSI IDs. This feature is 
disabled by default in the Symbios PCI BIOS and the SYMC8XX.MPD and SYM_HI.MPD 
drivers. Some legacy (non-SCAM) peripherals have problems with the SCAM 
protocol, resulting in the device either not being seen by the operating 
system, or not working correctly. However, if usage of the SCAM protocol is 
desired, there are two methods for enabling SCAM: Method 1 and Method 2. 


*   *   * Method 1 *   *   *

Use this method when the adapter has NVRAM. During system boot, after the 
Symbios PCI BIOS banner, the message "Press Control-C to start Configuration
Utility" is displayed for a few seconds. Press Control-C to start this utility.

Select the desired adapter, then "Adapter Setup". On the Adapter Setup menu, 
highlight "S-SCAM Support" and press Enter. Use the up/down arrows to select 
the ON setting, and press Enter. Exit from the menus and save the settings. 
This will turn on SCAM for both the PCI BIOS and the SYMC8XX.MPD or SYM_HI.MPD
driver (whichever is controlling the selected adapter). To disable SCAM, repeat
the above procedure to change the setting to OFF. 

*   *   * Method 2 *   *    *

For adapters that do not have NVRAM, SCAM can be enabled within Windows 95/98: 

1. Click on the Start button. Move to Settings, Control Panel, and click. Double 
   click on the System icon. Click the Device Manager tab.

2. Either double-click on the SCSI controllers entry, or click once on the 
   plus sign to the left of it. One entry for each host adapter installed in 
   the system appears. Select the adapter desired, then click on the 
   Properties button. Click on the Settings tab. 

3. In the Adapter settings entry, type in "do_SCAM=1;", without the quotes. If 
   there is already an entry displayed, type the above at the end of the 
   existing entry. Be sure to include the semi-colon. 

4. Click OK to exit the Settings tab.

5. Click OK again. If the entry was changed, the "System Settings Change" 
   dialog box appears. Click Yes to restart the computer.

After the system reboots, SCAM is enabled for the selected adapter. To 
disable SCAM, delete the entry that was made above. If other entries exist, 
be sure to leave them intact.


*  *  *  *  *  * Multiple Symbios Host Adapter Considerations *  *  *  *  *  *

If multiple Symbios PCI SCSI host adapters are installed in the system, special
actions are sometimes required to install or change drivers. This is due to the
fact that some Symbios host adapters are supported by the bundled driver, and
also that one Symbios driver can support multiple Symbios host adapters
installed in the system.

With multiple Symbios adapters, it is possible to have a situation where one 
adapter is assigned to one driver, and another is assigned to a different
version of the same driver. This can cause conflicts that may cause the system
to switch to real mode drivers, affecting performance and access to CD-ROM or
tape drives.

When installing additional boards or updating drivers, two methods are
available for ensuring that all Symbios host adapters are controlled by only 
one version of the appropriate driver.

*   *   * Method 1 *   *   *

Using the Device Manager, change the driver for a particular host adapter to 
the desired driver. When asked to reboot the system for the new settings 
to take effect, click No. Change drivers for all Symbios host adapters 
in the system supported by that same driver to the new driver, and reply No to
rebooting until the final adapter is changed. If booting from a SCSI device,
ensure that the adapter controlling this device is the last one changed.

*   *   * Method 2 *   *   *

Determine which driver file is active for all adapters through the Properties 
tab in Device Manager. Go to the \WINDOWS\SYSTEM\IOSUBSYS directory and 
rename the driver file to an extension other than MPD. Reboot the system.
 
While booting, the system may ask to load the bundled driver file from the 
Windows 95/98 installation disk. Click OK. When the system says it cannot 
find the file, click Skip File. Do this for all adapter messages while 
booting. After the system is booted, use the Device Manager to change the 
driver for each adapter to the desired driver. Do NOT reply Yes to reboot the 
system until the final adapter has been changed.

Download Driver Pack

How To Update Drivers Manually

After your driver has been downloaded, follow these simple steps to install it.

  • Expand the archive file (if the download file is in zip or rar format).

  • If the expanded file has an .exe extension, double click it and follow the installation instructions.

  • Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.

  • Find the device and model you want to update in the device list.

  • Double-click on it to open the Properties dialog box.

  • From the Properties dialog box, select the Driver tab.

  • Click the Update Driver button, then follow the instructions.

Very important: You must reboot your system to ensure that any driver updates have taken effect.

For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.

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