Here is what to expect if you plan on a WHS 2011 Rig Upgrade. I found a new i7 PC w/ 8GB of 1600 MHz Ram for $400.00 USD so I jumped on it for a new faster WHS 2011 PC. This one is so much faster backing up my Main Rig (MR). Example: Old WHS Rig: ASUS: P5G41-M LX2 MB Core 2 Duo E7500 @ 2.93 GHz 2 x 2GB DDR2 Memory 1st MR BU took 28 hours. New WHS Rig: Biostar H61MGV3 MB i7-2600K Unlocked @ 3.4 GHz 1x8 GB Corsair DDR3 Memory (1600 MHz) 4TB WD Enterprise HDD (recycled from old WHS rig) 1st MR BU took 12 hours & included 100GB of more data. Here is what I found out trying to use the same WHS install & just move the HDD over... It doesn't work, neither would my WHS server BU (saved because it had all the updates installed) So I had to reinstall WHS 2011 from scratch & do all the (270) updates to get it current. On the 4TB drive it was a waste of money buying one that bug as WHS 2011 can only see 2TB of the disk Once WHS 2011 was installed the unused space on the 4 TB drive was not accessible to use for storage, using Computer Mgr. anyway.