PCPer File Copy Test
Our custom PCPer-FC test does some fairly simple file creation and copy routines in order to test the storage system for speed. The script creates a set of files of varying sizes, times the creation process, then copies the same files to another partition on the same hard drive and times the copy process as well. There are four file patterns that we used to try and find any strong or weak points in the hardware: 10 files @ 1000 MB each, 100 files @ 100 MB each, 500 files @ 10 MB each and 1000 files at 1 MB each.
Creating and copying files should in theory bottleneck a given SSD at the bus bandwidth, but as you can see that's not the case. With our file creation test, things all come down to how a given SSD firmware has been optimized, and how that interacts with a command-line-based file creation tool. The 840 suffers a bit in large file writes, but as those files become smaller in size, it actually picks up speed, scoring about 20% *faster* than anything else weve tested once you get down to the 1MB file size. It also takes the cake at the 10MB size. This is a clear indicator that the 840 has been optimized for consumer use (a typical user does not frequently write files larger than 10MB, and if they do, they are not likely to be writing 500 of them in rapid succession).
Our file copy test performs its copies with test files that contain repeating patterns and are therefore highly compressible. This gives SandForce-driven drives like the Vertex 3 and Intel 520 a bit of an unfair advantage. Once you exclude those data-compressing drives, the 840 handily takes the rest of the field in nearly all areas.