Fujitsu latest to show 500GB laptop drive

Laptop computer storage is racing fast towards the 500GB level with Fujitsu becoming the third hard-disk drive maker to announce a drive at that capacity.

Fujitsu is accomplishing this capacity by combining three disk platters — the magnetically-coated disks on which data is stored — each with a 170G-byte capacity inside the drive. Hitachi, the first company to announce a 500GB drive, and Samsung Electronics are also using three platter designs.

The third platter increases the thickness of the drive to 12.5 mm versus most other laptop drives, which have just two platters and are 9.5 mm thick.

As a result the Fujitsu drive won’t fit into the drive bay on many laptop computers, so its availability doesn’t mean an instant capacity upgrade will be possible for all laptop users. Hitachi’s drive is also 12.5 mm thick, but Samsung said it has been able to keep the drive height at 9.5 mm on its Spinpoint M6 drive.

Fujitsu will begin selling its 2.5-inch drive in May. It will have a Serial ATA (SATA) interface and can transfer data at up to 300Mbps. The average seek time for reading data on the 4,200 rpm drive is 12 milliseconds and 14 milliseconds for writing data. Fujitsu didn’t announce pricing.

Hitachi said in January that it would ship its drive this month and Samsung announced a March shipping date. Both the Hitachi and Samsung drives spin the disk faster, at 5,400 rpm.

All three drives will also be aimed at the fast growing digital video recorder (DVR) market. Many of the DVRs use laptop drives because they are smaller and lighter than the 3.5-inch models typically made for desktop computers and servers.

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