BL460 spurious reboots across RH versions

[Don Vanco - Linux Ninja]

I have a client with a series of BL460c Blades. They are running 2 releases for RH:
RHEL 4U5
RHEL 5

SAN attached. Boot from local drive. Very vanilla installation of OS.

The firmware is updated to about 3 weeks to a month ago. I don't have exact revision at this time, but I believe that there _may_ have been a BIOS release since the last update.

The servers are NOT running any of the HP drivers/utilities OTHER than the OpenIPMI and
Proliant Essentials licesnsing (hp-pel)

The servers are rebooting every so often. We enabled crash dump - nothing gets logged. Tere's absolutely no logging whatsoever - they just go down.

Given that the issues is not constrained to a single OS release my belief is that the issue lies in the firmware or drivers.

My questions:
Has anyone had this issue?

What HP drivers and utilities are absolutely essential that might be at issue?

I can provide more detail as required.

Thanks
Don

[Change_happens]

You need to install PSP on these system. (proliant Support pack) and right now version is 8.0 latest.

Thanks,
Ajay