Sun Microsystems Sun Fire X4100, Примечания к продукту

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42 Sun Fire X4100 and Sun Fire X4200 Servers Product Notes • November 2006
AMD PowerNow! Might Cause System Clock to
Lose Ticks (6298500, 6281771)
The AMD PowerNow! feature is disabled in the BIOS by default. Before enabling it,
verify that your operating system and applications support the PowerNow! feature.
The PowerNow! feature changes CPU clock rates. A loss of timer ticks has been
observed while running recent Linux SMP kernels when PowerNow! is enabled.
This loss of timer ticks might result in timing errors in the kernel and in user
applications. Symptoms might include timers that prematurely time out and the
time of day clock appearing to behave erratically.
Workaround
Disable the PowerNow! feature by using the BIOS Setup utility. The menu path to
the feature’s screen is Main -> Advanced -> AMD PowerNow Configuration.
RHEL3: I/O Errors Are Displayed When
Initializing USB Mass Storage Device (6241851)
RHEL3 displays many I/O errors when a USB device is being initialized. The USB
mass storage driver uses the SCSI subsystem to access the device. When a USB mass
storage device is attached, the driver attempts to identify it as a SCSI device. The
I/O errors displayed are a result of this initialization probe. The I/O errors can be
ignored, and the USB device should work properly once it is initialized. This
problem and its workaround are documented at
:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=156831
.
RHEL3: Kernel Might Report Incorrect CPU
Information on Dual Core Processors (6241701)
When two dual core processors are installed on a Sun Fire X4200 server, the RHEL3
kernel might report four of the hyperthreaded CPUs with the same physical ID of 0.
Instead, the IDs should be 0 and 1 for each CPU.