Descrepencies in Free Space

Hi, I am using EX4 with 4 X 2TB, running on RAID1. My understanding of the RAID setup was: Volume 1 - Slot 1 & 2 (1 mirrored to 2?) Volume 2 - Slot 3 & 4 (3 mirrored to 4?) I was expecting total usable diskspace of 4TB (Volume 1 + Volume 2), which is correctly shown in Dashboard - 3.81TB Free. Question is when I Map Network Drive from My Computer (Win 7). The network drive shows only 1.78TB? I thought it should have 3.81TB free? Anyone can clarify this? Thanks in advanced.


Take a look at this link, hope it helps