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A – Installation Troubleshooting
Software Installation Issues
IB0056101-00 G A-3
A
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 -w
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
H8DCE-HT-e and the QHT7040 adapter. To fix this problem, set the operating
system selector option in the BIOS for Linux. The option will look like:
OS Installation [Linux]
Software Installation Issues
Some problems can be found by running ipath_checkout. Run
ipath_checkout before contacting technical support.