Next goes our homemade test of defragmentation speed. We created a very defragmented file system on a 32GB partition of a hard disk by loading it with music, video, games and applications. Then we saved a per-sector copy of the disk and now copy it to the HDD we want to test. The tested HDD is connected to the mainboard’s SATA controller whose operation mode (AHCI/Standard IDE) is controlled from the mainboard’s BIOS. Next we run a script that evokes the console version of the Perfect Disk 8.0 defragmenter and marks the time of the beginning and end of the defragmentation process. Thus, each drive is tested twice – with AHCI support turned on and off on the controller. You can refer to this article for details about this test.
The test in a real-life application is indicative of the improvements in Seagate’s products. The company’s drives used to be the slowest in this test but the 1.5TB model is good while the Seagate Barracuda 7200.12 even competes with the leaders represented by the WD Caviar Black. The results of the new WD Caviar Green are intriguing: the drive’s performance varies greatly depending on the controller’s mode. 5 minutes of difference is quite a lot!