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A – Installation Troubleshooting Software Installation Issues
Some BIOS’ do not have the MTRR mapping option. It may have a different name, depending on the chipset, vendor, BIOS, or other factors. For example, it is sometimes referred to as 32 bit memory hole. This setting must be enabled.
If there is no setting for MTRR mapping or 32 bit memory hole, and you have problems with degraded performance, contact your system or motherboard vendor and ask how to enable write combining.
Use the ipath_mtrr Script to Fix MTRR Issues
QLogic also provides a script, ipath_mtrr, which sets the MTRR registers,
enabling maximum performance from the InfiniPath driver. This Python script is available as a part of the InfiniPath software download, and is contained in the infinipath* RPM. It is installed in /bin.
To diagnose the machine, run it with no arguments (as root):
# ipath_mtrr
The test results will list any problems, if they exist, and provide suggestions on what to do.
To fix the MTRR registers, use:
# ipath_mtrr
Restart the driver after fixing the registers.
This script needs to be run after each system reboot.
See the ipath_mtrr(8) man page for more information on other options.
Issue with Supermicro® H8DCE-HTe and QHT7040
The QLogic adapter may not be recognized at startup when using the Supermicro
OS Installation [Linux]
Software Installation Issues
Some problems can be found by running ipath_checkout. Run ipath_checkout before contacting technical support.
