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Description of problem:
We have clients with approximately 300 servers.  They recently upgraded 10 of the nodes to RHEL AS4 u2 64bit.  The problem we are seeing is that when these servers are rebooted or there is a power failure, they will lose there mbr or get a corrupted grub.  The servers are dual Opteron, 4gb ram and 2 scsi hdd attached to an LSI 20320 scsi controller.  The drives are software raid0.  The partitions are as follows. swap is software raid0 1024, /boot is a physical raid0 volume comprised of software raid0, and / is software raid 0.  The current RHEL 3 machines are fine and can be rebooted all week long and do not exhibit this behavior and have been in production for quite a while with no issues.  The RHEL4 machines with the 2.6 kernel do however.  The machines must be network booted and the grub rescued.  The machine does not do this every reboot, but will do it eventially.  I currently have a unit from the farm in house and will be conducting some testing as well to see if this can be pinpointed.  Any help from anyone would be appreciated.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.install rhel4.
2.start rebooting machine
3.rescue grub
  

Actual Results:  Once I rescued grub everything works fine.  Problem is that the grid resides on the rhel4 nodes and can not for any reason be required to be rescued.

Additional info: