LS, I have ESXi 4, with all the 2009 updates installed. When i try to update the last firmware update, i receive the following error: Copy of /bootbank/sys.vgz to /tmp/stage/firmware/bank/sys.vgz failed md5sum validation (8:02:31:29.332 cpu1:1787979) warning 20-Jan-10 9:42:02 PM I updated the vmware-tools separatedly, which succeeded. I receive this message if i use the update GUI, but also when using the CLI tool. I haven't got a clue how to solve this, anyone any ideas? Or having similar problems?