It's all about when you bought the drive and what the date of manufacture was. The EVDS drives are just starting to show up with the Intellipark problem. I did two TiVo HD upgrades (in October and November) using EVDS drives that worked fine... ... but that was after my first attempt failed. I ordered an EVVS drive and it was delivered the same day it was taken off the recommended list in this thread. The new EVVS drives were starting to show the Intellipark problem during the week the drive was being shipped .The Intellipark problem (only recently diagnosed) is gradually migrating to other WD drives like the EADS and EVDS.