Owner's Manual

Installation Instructions and Important Information 23
System Stops Responding Intermittently During Initialization of HPET Timer
On certain PowerEdge Systems running the reboot loop service, the system
may hang during the High Precision Event Timer (HPET) initialization.
The kernel initializes the HPET timer and then performs a verification on the
functionality of the timer. This verification may fail and result in a kernel panic.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
System Hangs When sginfo Command is Issued on a Storage Connected to PERC
3D/I Controller
If the operating system for your PowerEdge system is installed on a storage
connected to PERC3D/i controller and configured with RAID 1, issuing a
sginfo –a /dev/sdX or sginfo –s /dev/sdX command results in the system freeze.
To work around this issue, use the sg_inq /dev/sdX command that performs
the same function as the sginfo command.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
Wrong Processor Core Information Displayed With Red Hat Enterprise Linux 4
Update 5
On systems with an Intel 72XX processor, /proc/cpuinfo displays the
wrong number of cores.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
PowerNow! Driver Does not Load on the 32-bit Version of Red Hat Enterprise Linux 4
On systems running the 32-bit version of Red Hat Enterprise Linux 4 and
Demand Based Switching (DBS) enabled in the BIOS, the PowerNow!
driver does not get loaded automatically. To load the driver manually, use the
following commands:
modprobe powernow-k8
service cpuspeed start
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
RHELIIG.book Page 23 Thursday, April 14, 2011 12:15 PM