Summary: Unit was described as "new" and "OEM Pull". Well, the OEM pull part is true. The drive I got in August 2014 was made in October 2010. The "new" part - not so true. S.M.A.R.T. data show 28,465 hours of use and 79 power cycles. It looks like this drive was pulled from a data center or server where it was used 24/7 for the last 4 years. Two stars because the unit is, for the moment, working perfectly.
Summary: The drive listed is a Hitachi HUA (Hitachi Ultra Star) disk drive. That's a high cost "Enterprise rated" disk drive. There is a very similar part with a HDS prefix (Hitachi Desk Star). The Ultra Star is designed for 24/7 server use. The Desk Star (HDS722020ALA330) is designed for desktop use with far fewer hours per year on power. If you pay for the HUA, make sure that's what you get.
Summary: After 5 months , all of my data has to be wiped off. You can read the data on the drive 3 items at a time before it will crash. You can not copy or delete anything with out a crash, and it does not have a WARRENTY. Hitachi told me to return it to the seller. This was a waste a money!!!
Summary: with the slightly more money you paid for, this is a reliable model from a known manufacture such as Hitachi. If you google the failure rate of hdd, you will see the rate is much higher for other manufacture like seagate or WD. So I would suggest Hitachi for Toshiba for future HDD upgrade.
Summary: The warranty on these drives is quite confusing. On one hand, the description of the drive states that they have a limited five year warranty. Yet, when the vendors are contacted they claim it only has a one year warranty. I was assured by a couple of vendors that the five year Hitachi warranty no longer applies to these "older drives".