Western Digital WD7500AAKS 750GB SATA HDD
Next up is PCMark05 from FutureMark Corp. We specifically used only the HDD Test module of this benchmark suite to evaluate all of the drives we tested versus the WD7500AAKS. We consulted Futuremark's white paper on PCMark05 for an understanding of what this test component entails and how it calculates its measurements.
Courtesy, Futuremark Corp. -
For these tests, we use RankDisk, an application developed and copyrighted by Intel. In our testing, we found RankDisk to be suitable for a neutral benchmark. RankDisk is used to record a trace of disk activity during usage of typical applications. These traces can then be replayed to measure the performance of disk operations for that usage. RankDisk records disk access events using the device drivers and bypasses the file system and the operating system's cache. This makes the measurement independent of the file system overhead or the current state of the operating system. In replaying traces, RankDisk always creates and operates on a new "dummy" file. This file is created in the same (or closest possible) physical location of the target hard disk. This allows the replaying of traces to be safe (does not destroy any existing files) and comparable across different systems. The traces contain different amount of writing and reading on the disk; total ratio in the HDD test suite disk operations is 53% reads and 47% of writes. The following input traces are used:
Windows XP Startup: This is the Windows XP start trace, which contains disk activities occurring at operating system start-up. The test is 90% reading and 10% writes. This trace contains no user activity.
General Hard Disk Drive Usage:
This trace contains disk activities from using several common applications.
- Opening a Microsoft Word document, performing grammar check, saving and closing
- Compression and decompression using Winzip
- Encrypting and decrypting a file using PowerCrypt
- Scanning files for viruses using F-Secure Antivirus.
- Playing an MP3 file with Winamp
- Playing a WAV file with Winamp
- Playing a DivX video using DivX codec and Windows Media Player
- Playing a WMV video file using Windows Media Player
- Viewing pictures using Windows Picture Viewer
- Browsing the internet using Microsoft Internet Explorer
- Loading, playing and exiting a game using Ubisoft™ Tom Clancy's Ghost Recon
The General Usage trace is 60% reads and 40% writes.
Virus Scanning: Virus scanning is a critical task in today's PC usage. As the major bottleneck of scanning viruses is in hard disk activity, it is reasonable to include virus scanning as a HDD test. The test consists of HDD activity of scanning 600MB of files for viruses. The Virus Scanning test is mostly disk reading (99.5%).
The PCMark05 tests reveal results similar to those in Sandra. When it comes to the General Usage and XP Startup tests, the WD7500AAKS performs quite well, besting all of the competition. Additionally, the it outperforms all of the other drives in the Virus Scan test by about 2MB/s or more.
PCMark05's overall Hard Disk Drive test score is representative of a weighting of two other tests in addition to the tests we've given detail for above, specifically File Write and Application Loading. In our previous Western Digital review, the WD5000KS whooped on the competition, but it can't hang with the WD7500AAKS. The WD7500AAKS grabs an almost 7% lead over the WD5000KS.