Memory corruption with Windows 2003 guest on ESX 4.1 (260247)

[ROMCH]

Issue:

I got some VMs with a guest OS Windows 2003 Server with 2 vCpu and 4GB RAM, 1 Vol C: 50GB and 1 NIC.

This VMs are running on a vSphere 4.1 HA & DRS Cluster with 3 Hosts.

On this VM's on the C volume in the file boot.ini the /3GB Switch is ON since serveral years WITHOUT any issue.

After I recently upgraded my ESX hosts from 4.0 to 4.1 (260247) and upgraded the VMTOOLS on the affected VMs,

I got memory corruption on the above deVMs above.

The memory corruption disappears, if I remove as a workaround the /3GB Switch in the Windws boot.in file.

Has anybody any ideas on this strange behavior?

Infrastructure:

Hosts:     3      HP DL385 G5p 2 cpu's QC & 64GB RAM

Vcenter:  1      HP DL360g6 with WIndows 2003 x64 4GB RAM etc.
   

SAN:      2      MSA2000fc  & 2 HP Fibre Channel switches

[DSTAVERT]

Have a look at http://kb.vmware.com/kb/1026851

[ROMCH]

Many thx's

I would not found this KB as fast as you.

[DSTAVERT]

Very welcome. Glad to help.