Hi all
I have an esxi 6.5 with latest updates to my home lab, with 3 local ssd disks 250GB each as datastores vmfs 6 formated.
I have some windows VMs Thin provisioning.
In windows, disks are shown as thin provisioned drives and optimization is available.
If i use thick disks windows recognize them as SSD and i get optimization is not available.
No matter what cluster size is (4K to 64K) when i write and delete files in disks i see that space efficiency is reduced.
Now in a Win10 VM i see needs optimization and 25% space efficiency. All files from disk are deleted and the drive is empty.(see attached pictures)
Running optimize-volume -retrim -slabconsolidate does not help.
Status deos not change. Needs optimization and space efficiency 25% again
If i format the disk space efficiency will returned back to 100%
So what is space efficiency in thin provisioned disks (or in windows) and how to get back to 100% ???
This happened to all my Windows VMs soon or later with variable space efficiency percents (%)
Except that everything is working as expected (umap initiated from VM, reclaiming free space, ....)
*English is not my native language so i am sorry for some syntax errors....