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8.065 bytes |
Service Hints & Tips |
Document ID: GSMH-3EUM3Z |
PC Server 325 - Configuration conflicts
Applicable to: World-Wide
Configuration Conflicts:
The resources used by a server consist of interrupt request levels (IRQs), direct memory access channels (DMAs), I/O ports, and memory. This information is useful when a resource configuration conflict occurs.
Conflicts in the configuration occur if:
- A device is installed that requires the same resource as another device. (For example, if you install an ISA network adapter and an EISA network adapter, both requesting IRQ 5 , only one of the adapters can be configured.)
- A device resource is changed (for example, changing jumper settings).
- A device function is changed (for example, assigning COM 1 to two different serial ports).
- An installed software program requires the same resource as a hardware device (for example, an expanded memory specification (EMS) device driver that uses the address required by the SVGA video adapter).
The steps required to resolve a configuration error are determined by the number and variety of hardware devices and software programs installed in the system.
If a hardware configuration error is detected, a configuration error message appears after the server completes POST, but before the operating system starts. You can bypass the error or start one of the configuration utility programs. Use the up and down arrow keys to select Continue or Exit Setup , then, press Enter. Continue will start the Configuration/Setup Utilities program. Exit Setup will bypass the error and load the operating system. You can also press Esc to exit setup and load the operating system. To start the EISA Configuration Diskette, insert the diskette in the diskette drive and press Esc. The Configuration/Setup Utility program and the EISA Configuration program configure the system hardware and PCI interrupt requests. These programs do not consider the requirements of the operating system or the application programs.
Changing the Software Configuration:
The best way to resolve memory-address conflicts is to change the addresses used by the application program or the device driver.
If a device driver is causing a memory-address conflict, refer to the operating-system documentation or the documentation supplied with the device drivers.
Resolving Hardware Configuration Conflicts:
Use the following information to help resolve hardware configuration conflicts:
1. Run the Setup program to view and change resources used by the system board functions and the PCI interrupt requests (IRQs), if necessary. Record the current settings before making any changes. (See "Configuration/Setup Utility Program.")
2. Determine which adapter or device is causing the error. The EISA Configuration program specifies how the server checks for resource conflicts. Initially, this verification mode is set to automatic. Use the Advanced selection of the EISA Configuration Diskette's View or edit details screen to change the setting (see "EISA Configuration Advanced Function"). The automatic verification mode might disable adapters or system board features. For example, if you choose IRQ 4 for an adapter, the program disables Serial Port 1, which uses IRQ 4. If this happens, and you do not want this feature disabled, choose another IRQ for the adapter. If you set the verification mode to manual , the configuration utility program does not try to resolve a conflict. Instead, you have to determine if a resource conflict has occurred and then resolve the conflict. When the verification mode is set to manual, an asterisk (*) appears on the View or edit details screen next to adapters in conflict. If the EISA Configuration program cannot resolve a configuration error, it deactivates the adapter and displays the deactivated status ( <>) on the View or edit details screen. Use the Advanced selection of the EISA Configuration Diskette's View or edit details screen to update or copy the server's system configuration information file (see "EISA Configuration Advanced Function").
3. Change configuration resource allocations. Use the built-in Setup program to view or change system board resource allocations. Use the Advanced selection of the EISA Configuration Diskette's View or edit details screen to view the available or the used system resources (see "EISA Configuration Advanced Function"). Use the Edit Changes selection to change resource allocations for complex configurations.
4. Change adapter jumpers or switches. Jumpers and switches define the system resources that a device can use. If the settings are incorrect or set to use a resource that cannot be shared, a conflict occurs and the device remains deactivated by the configuration program. Use the EISA Configuration Diskette's Step 4, Examine switches or print report screen to verify switches (see "EISA Configuration Menu Selections" ). Read the documentation supplied with the device.
5. Change system board jumpers or switches. Remove the cover; then, refer to the system-board diagram inside the server.
6. Remove the device or adapter. Some configurations are not supported (for example, you cannot operate the server with two PCI SVGA adapters installed).
7. Assign EISA memory addresses starting with DFFFF (in hexadecimal), and work downward to address C8000 (in hexadecimal). PCI devices are automatically assigned memory addresses starting from C8000 working upwards.
Resolving Software Configuration Conflicts:
The memory-address space and interrupt levels (IRQs) used by some hardware options might conflict with addresses defined for use through application programs or through use by Expanded Memory Specification, EMS. (EMS is used only with DOS.)
If there is a conflict, one or more of the following conditions might exist:
- The system cannot load the operating system.
- The system does not work.
- An application program does not operate, or it returns an error.
- Screen messages indicate a conflict exists.
You can resolve conflicts by changing either the software or the hardware configuration.
Note:
Start the EISA Configuration Diskette to view the addresses used by the system board functions. Use the Advanced function of Step 3, View or edit details to view the addresses used by the adapters. (See "EISA Configuration Advanced Function" for instructions.)
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Hint Category |
Configuration, Hardware Maintenance Information | |
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Date Created |
04-03-97 | |
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Last Updated |
03-08-98 | |
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Revision Date |
31-07-99 | |
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Brand |
IBM PC Server | |
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Product Family |
PC Server 325 | |
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Machine Type |
8639 | |
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Model |
EJ0; ES0; ESV; RD0; RF0; RS0; XD0; XDV; XF0; XFV; XJ0; XS0; XSV; YS0 | |
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