I have been running an ESXi 5.5 environment for 13 days now on BL460C Gen8 servers as well and today have started to get the MKS issues with all my VMs on all 4 hosts. I can RDP to them all and still seem to have control of snapshots etc through the console as normal.
Feel slightly better that this is a known issue reading all these posts, but not that there is no known fix.
It is also causing havoc with my Veeam backups as some of the datastores are showing as locked, with the following error which I presume is related:
01/12/2013 05:59:35 :: Processing 'PHGBI1' Error: Client error: File does not exist or locked. VMFS path: [[Datastore05] PHGBI1/PHGBI1.vmx].
Please, try to download specified file using connection to the ESX server where the VM registered.
Failed to create NFC download stream. NFC path: [nfc://conn:phgvcentre.progressgroup.org.uk,nfchost:host-14,stg:datastore-31@PHGBI1/PHGBI1.vmx].
I am in the middle of migrating all my VMs over to the new environment but think I will get HP support involved before I go any further.
