Error Creating Snapshot On virtual Machine: Cannot Write To MultiExtents

You may receive a “disk is full” error when trying to create a snapshot of a virtual machine in vSphere ESXi 5. If the machine is powered on, it will also crash and be powered off. Any attempts to power on will result in disk read failures.

The operation on the file “/vmfs/devices/multiextent/42b5fd59-Ad Server-0000010s001.vmdk” failed (Invalid argument). The file system where disk “/vmfs/devices/multiextent/42b5fd59-Ad Server-0000010s001.vmdk” resides is full.

You may see an event log similar to this one:

VMware ESX cannot synchronize with the disk before canceling. Disk /vmfs/devices/multiextent/42b5fd59-Ad Server-000001-s001.vmdk may be inconsistent.

The cause of the problem is not having a working directory set in your virtual machine configuration file. In my case, the virtual machine was moved from VMware Server 2 to ESXi 5. Because of this move, the working directory was not specified. To repair, shut down your VM and add the following to your VMX config file Continue reading Error Creating Snapshot On virtual Machine: Cannot Write To MultiExtents