The unused disk blocks of the virtual machine Disks have not been scrubbed on the file system VMWare Error

   Updated : October 24, 2017




The unused disk blocks of the virtual machine

While Enabling Fault Tolerance (FT) on virtual Machine, following error occurred.

Error:

The unused disk blocks of the virtual machine’s disks have not been scrubbed on the file system.  This is needed to support features like Fault Tolerance.

Reason of Error:

Fault Tolerance cannot be enabled on a powered-on virtual machine that has thick formatted or lazy-zeroed disks.

Soultion:

To enable FT, power off the virtual machine, turn on FT, and power on the virtual machine again. This changes the disk format of the virtual machine.