Next goes our homemade test of defragmentation speed. We created a very defragmented file system on a 32GB partition of a 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 disk we want to test. 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. We run this test with AHCI enabled. For more information about it, you can refer to this article.
After copying the partition image to the WD10EARS, we aligned it with the WD Align tool.
Well, we’ve got some interesting results here. The Samsung F3 is first. Samsung has something to be proud about until Western Digital transitions its 1-terabyte Caviar Black drives to 500GB platters. The Hitachi 7K1000.C has dense platters, too, but cannot overtake WD’s Caviar Black series.
The WD10EARS is not competitive even when aligned. The sector simulation overhead is too high at both reading and, especially, writing. The unaligned disk is just awful as it took over an hour to perform the task. We’ve only seen such poor performance with server-oriented SAS drives.