I have been noticing in Unisphere for VMAX that the allocated space on TDEV are not correlating to that in VMware. For example, I have had one TDEV stating that it's 99% used, but when I look in VMware it's only 80%.

Would I benefit from running a Start Allocate/Free/Reclaim on these devices? - I'm just not sure which option to use here: - Reclaim volumes?

Also, with all the changes that happen with VMware, migrations and deletions I seem to recall an unmap command in vmktools for esxi. My colleague had to do it with our XtremIO array, so I am wondering if it's the same situation as with the VMAX.

Thanks!