If there are eight paths per LUM in a vSphere6.5 environment, what is the maximum number of LUNs usable by an ESXi host?

128 would only be correct if the total paths per host were limited to 1024 (1024 / 8 = 128), but the vSphere 6.5 configuration maximums support enough total paths to reach the 512 LUN ceiling.

In vSphere 6.5, the published configuration maximum for LUNs per ESXi host is 512. With 8 paths per LUN, total path consumption would be 512 x 8 = 4096 paths, which aligns with the vSphere 6.5 total paths per host maximum, making 512 the correct and binding LUN limit in this scenario.

64 does not correspond to any documented vSphere 6.5 LUN or path limit and is well below the supported maximum.

256 does not match the published vSphere 6.5 per-host LUN maximum; it is neither the LUN cap nor the path-derived limit given 8 paths per LUN.