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.
Most of these enterprise units are on the slower side when it comes to file creation, a heavily sequential operation, mainly due to firmware more optimized for consistency in random IO.
Our batch file copy test forces simultaneous sequential reads and writes on the drives under test, and we can see the DC S3500 struggle to keep up under the mixed load, even being beaten by the WD Velociraptor in this test. The limited write speeds had the most negative impact in this test. In their defense, DataCenter SSDs are not expected to perform sustained bulk sequential transfers such as these for very long.