Extremetech & Anandtech Review Hitachi’s 7K1000 1TB Drive
Extremetech and Anandtech have both posted reviews of Hitachi’s 7K1000 1TB hard drive, which was announced earlier this year and is currently expected to cost around $400.
For an impressive $399 ($0.39/gig), is it worth your bucks?
One of the first issues to note is that you may not see an actual one terabyte capacity on your system. First, the formatted capacity is always less than the raw space available on the drive. Directory information and formatting data always take up some space.
Second, the hard drive industry's definition of a megabyte differs from the rest of the PC business. One megabyte of hard drive space is 1,000,000 bytes: 106 bytes. Operating systems calculate one megabyte as 220 bytes, or 1,048,576 bytes. Once installed and set up, Hitachi's 1TB hard drive offers up an actual formatted capacity of about 935GB, as measured by the OS.
We tested three different drives using this configuration. Along with the 7K1000, we ran tests on Seagate's Barracuda 7200.10, 750GB drive and the Western Digital Raptor. It's no surprise that the Western Digital Raptor drive offers better write, read, and access time performance, given it's 10,000RPM spin rate and enterprise-class construction. However, the Hitachi drive substantially outperforms the Seagate 7200.10 in all the benchmarks except burst transfer rate in our raw performance tests.
What we did not expect was that this drive would be offered exclusively through Dell or its subsidiary Alienware in select XPS, Aurora, or Area 51 gaming desktop systems before general retail availability in the next two to three weeks.
The next evolutionary step in the storage industry for solving today's current issues is the utilization of perpendicular recording technology. What is Perpendicular Recording Technology? Simply put, during perpendicular recording the magnetization of the disc stands on end, perpendicular to the plane of the disc, instead of lying in the disc's plane as it does in current longitudinal recording. The data bits are then represented as regions of upward or downward directed magnetization points, whereas in longitudinal recording, the data bit magnetization lies in the plane of the disc and switches between pointing in the same and then opposite directions of the head movement. The media is written to a soft magnetic under-layer that functions as part of the write field return path and basically generates an image of the recording head that doubles the available recording field resulting in a higher recording density compared to longitudinal recording.