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 HDD is tested twice: with the controller’s AHCI support enabled and disabled. You can refer to a dedicated article for details about this test.
Western Digital’s drives take the two top places in this test, too. The Blue model is a quarter of a second faster than the Black one. The Samsung is somewhat slower, and the performance of the WD Caviar Green looks normal. It is the Seagate that took too much time to do the defragmentation – over half an hour. Interestingly, the test was performed slower with enabled NCQ only on the Seagate drive. It probably didn’t like the change of the mainboard’s SATA controller driver in the NCQ-enabled mode.