ESX disconnected from vCenter

One of my esx 5.5 u3 hosts was disconnected from vCenter. The VMs were still running but reconnecting it to vCenter would result in an vmodl.fault.HostCommunication error. I logged into the console and looked at the logs and saw that the ramdisk /tmp was full. I verified that it was full with esxcli system visorfs ramdisk list [1] A […]

Convert VMDK to Thin without vMotion

Storage vMotion is wonderful but vMotion isn’t available without vCenter. bah! This was a nice guide: Enable SSH to the host. Browse to the VM cd /vmfs/volumes/<datastore>/<vm> Create a thin version of the VM. vmkfstools -i d <vharddrive>.vmdk -d thin <vharddrive>-thin.vmdk Remove the thick .vmdk Attach the thin .vmdk Delete the old .vmdk and *-flat.vmdk […]

Can’t format VMFS5 partition

While trying to add an ssd to my esxi 5.5 server I encountered a bug when it tried to format and add the storage: Error:A specified parameter was not correct. Vim.Host.DiskPartitionInfo.spec Error Stack Call “HostStorageSystem.ComputeDiskPartitionInfo” for object “storageSystem” on ESXi “x.x.x.x.” failed. I found a blog post describing the same issue and found it was […]

Update Manager had an error

I ran across this little gem of a bug on VMWare’s Update Manger while trying to scan any of our hosts: VMware Update Manager had an unknown failure: Check task and events It was probably caused from our last upgrade. We upgraded from vCenter 5.1 on a Windows 2003 32-bit to 5.5 on Windows 2008 […]