Articles: Storage
 

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Defragmentation

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. The tested disk is connected to the mainboard’s SATA controller whose operation mode (AHCI/Standard SATA) 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. AHCI is turned on. You can refer to this article for details about this test.

Strictly speaking, this test makes no practical sense for solid state drives because there is nothing to defragment on them. Every memory cell is equivalent to any other, so defragmentation won’t have any effect. However, this test will allow us to compare how much time SSDs spend reading and writing the same amount of small data blocks.

This test never stops surprising us. Sometimes its results are just as expected, but at other times, they make no sense. So what do we have here? The MLC-memory models are in the lead. Yes, it is the supposedly slower type of flash memory. The Intel is on top and the next three places go to the MLC-based models including the swift Kingston V+ series. The JMicron-based drives did not make it into the leading group, though. They split up again, by the way: the 128GB model is almost two times as slow as its series mate.

The OCZ Agility is an unpleasant surprise. Yes, the SLC-memory models with the Indilinx controller are not really good in this test, but the Agility is about the slowest of all! We don’t even have the slightest inkling as to the reason for such a poor performance.

Performance in WinRAR

Now we are going to show you one more interesting test in which we use WinRAR version 3.8 to compress and then uncompress a 1.13GB folder with 8118 files in 671 subfolders. The files are documents and images in various formats. These operations are done on the tested drive. This test depends heavily on CPU performance, but the storage device affects its speed, too.

There is a group of fast SSDs when creating the archive. It includes both models of the Super Talent UltraDrive GX series, the Intel X25-M and the Kingston V+. The Wintec and the 128GB Kingston V series take the most time to perform this task.

We’ve got a new leader when unpacking the archive. It is the Super Talent UltraDrive GX, with MLC memory chips. The rest of the podium is occupied by the Kingston V+ drive and the Super Talent MasterDrive SX. The pair of JMicron-based drives is still very poor, the 128GB being slower of the two.

 
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