sdelete

Hi to all. I have a number of VM's. I will use a file server as an example. I have 3 disks provisoned:

D1: 40GB Thin (OS)

D2: 250GB Thick EZ

D3: 250GB Thick EZ

Over time data has been deleted from disks 2 and 3. Am I correct to think running sdelete against the disk within the guest OS will NOT make the vmdk files smaller as they are Thick Eager Zeroed disks?

I want to reduce the size of my backups.

There is plenty of documentation regards reclaiming space from thin provisoned disks using sdelete and storage vMotion.

Kind Regards,

Phil.