Software/Hardware Mismatch Problems
Software/Hardware Mismatch Problems
If a failure appears to be the result of a defective FRU, but the diagnostic tests run error-free, there
might be a software and/or hardware mismatch. These problems might be intermittent, and they can be difficult to diagnose.
First of all, verify the BIOS level (for machine-types with FLASH-BIOS) and if a down level BIOS is found, then
try first an BIOS upgrade.
If you are experiencing this type of problem, and the operating system is of the direct driver variety, which
bypasses the BIOS interface, such as:
- AIX
- Netware
- SCO XENIX
- Some windowing interfaces
- Other UNIX - based software
the most-likely cause of the problem is a mismatch between the software and the hardware.
Applications that use the Multiprotocol Adapter/A, magnetic tape drives, and some SCSI devices such as
CD-ROM, require direct software drivers. There is no BIOS interface to these devices in PS/2 products.
The following information is provided to help you resolve these problems.
Software/Hardware Compatibility
Direct-driver software is sensitive to variations in hardware design.
The resulting incompatibilities are usually addressed with a revision (sometimes referred to as a patch), to the direct-driver
software. Make certain the software is current and that all known revisions are installed. The IBM on-line bulletin board
(sometimes refereed to as PCPROD), and other software tools sources, such as Novell Netware, should be referenced by the
software support personnel for any revisions provided by the appropriate software vendor.
The most-likely cause of these types of problems, when direct-driver software is involved, is the failure to obtain the
latest revisions from the software vendor.
Software Installation
It is very important to follow the vendor's installation procedures. The software should not be migrated from another
system, unless the installation instructions indicate that migration is supported (especially from a different
model in the product line).
Migrating adapters from slower systems to faster systems might cause problems. This is due to
device-specific, system-specific, or time-dependent software code, that controls these devices.
Adapter and Software Compatibility
Hardware adapters for some operating systems must be approved by the software vendor to be compatible with that software.
The approval is specific to the system, adapter E.C. level, and the software version. Contact the software vendor to confirm that system and adapter
configuration is supported by their software level. The compatibility support is especially important for, (but not
limited to), all LAN adapters and RIPL applications.
Software Failures After a Hardware Change
After the initial installation, any changes in the hardware configuration (addition or changes of adapters or features), might
result in computer failures and require the reinstallation of the operating system or the software revisions.
Specific hardware configuration changes (such as memory address, interrupt level, or programmable option select), might result
in a computer failure if the software has unique operating requirements.
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