We have 1 vm with VMware Photon OS (64-bit) installed.
It is using thin disks, and is only using 20% disk, but storage usage in vCenter says 100%.
Is it possible for Photon OS to Trim/Unmap like Linux and Windows?
If yes, how?
I don't thing Trim/Unmap will work. You can to do sVMotion as workaround.
fstrim might work.
You may look this link if this can help you. Else you can do storage vMotion as advised earlier.
UNMAP/TRIM Space Reclamation on vSAN | vSAN Space Efficiency Technologies | VMware