Installation guide

All Architectures

# yum update

You will also see this error if you downgrade glibc to an earlier version on an installed 5.3 system.

• mvapich and mvapich2 in Red Hat Enterprise Linux 5 are compiled to support only InfiniBand/

iWARP interconnects. Consequently, they will not run over ethernet or other network interconnects.

• On systems with more than two encrypted block devices, anaconda has a option to provide a

global passphrase. The init scripts, however, do not support this feature. When booting the system,

entering each individual passphrase for all encrypted devices will be required.

• When upgrading openmpi using yum, the following warning may be returned:

cannot open `/tmp/openmpi-upgrade-version.*' for reading: No such file or

directory

The message is harmless and can be safely ignored.

• Configuring IRQ SMP affinity has no effect on some devices that use message signalled interrupts

(MSI) with no MSI per-vector masking capability. Examples of such devices include Broadcom

NetXtreme Ethernet devices that use the bnx2 driver.

If you need to configure IRQ affinity for such a device, disable MSI by creating a file in /etc/

modprobe.d/ containing the following line:

options bnx2 disable_msi=1

Alternatively, you can disable MSI completely using the kernel boot parameter pci=nomsi.

• A bug in the updated /etc/udev/rules.d/50-udev.rules file prevents the creation of

persistent names for tape devices with numbers higher than 9 in their names. For example, a

persistent name will not be created for a tape device with a name of nst12.

To work around this, add an asterisk (*) after each occurrence of the string nst[0-9] in /etc/

udev/rules.d/50-udev.rules.

• The smartctl tool cannot properly read SMART parameters from SATA devices.

• A bug in previous versions of openmpi and lam may prevent you from upgrading these packages.

This bug manifests in the following error (when attempting to upgrade openmpi or lam:

error: %preun(openmpi-[version]) scriptlet failed, exit status 2

As such, you need to manually remove older versions of openmpi and lam in order to install their

latest versions. To do so, use the following rpm command:

rpm -qa | grep '^openmpi-\|^lam-' | xargs rpm -e --noscripts --allmatches

• When using dm-multipath, if features "1 queue_if_no_path" is specified in /etc/

multipath.conf then any process that issues I/O will hang until one or more paths are restored.