Hitachi has started shipping the world's first hard drive with 4TB capacity. There has not been an official press release from Hitachi yet, but a Japanese site Akiba has spotted the hard drive on sale. The hard drive carries model number HDS5C4040ALE630 and is branded as Deskstar 5K.

The brand suggests that it's a lower performance drive with rotational speed of 5900rpm (Hitachi calls this "CoolSpin"). The drive comes with 32MB of cache just like the 2TB and 3TB versions, and uses SATA 6Gb/s interface. The drive is priced at 26,800 Yen, which translates to $345. For comparison, the 3TB Deskstar 5K costs 19,780 Yen ($254), so the price per GB is very close. The drive appears to use five platters, so two more platter than the previous 3TB monster.

The release comes at an odd time because hard drive supply is still very limited due to the floods in Thailand. The components of this drive are manufactured in Thailand according to the product packaging, meaning that the supply may be very limited in the short term. There is no word on global availability, though.