Hi all, does anyone know if there's a way to zero a vmdk when deleting a VM via the thick client or web interface? We've switched to XtremIO storage, so the problem is that when deleting a VM, vcenter/vsphere may delete the vmdk file from VMFS' perspective, but that unique data that was once a VM remains as allocated physical storage on the XtremIO unless we're lucky and a new VM's vmdk uses vmfs space previously inhabited by a now-deleted VM. This results in us having absolutely no idea how much physical storage is truly left on the array; do we really have 50% from each vmdk replacing a previous one and using the same blocks, do we really have 90% because future vmdk's would be put on top of space that's currently used from XtremIO's perspective, etc.
I supposed the only way to really know what you have left on your xtremio would be to live migrate all your vm's to a new LUN, zero the entire LUN, move things back, until you've gone through them all. This of course does not take into account waste at the guest file system level from deleted files.
Thanks!
