File copyingThis brings us to file copying. We measure reading and writing speeds of various groups of files, as well as close and far copying. These groups were composed of:
- A collection of large files: 6 files (on average 2.2 GB) totalling 13.2 GB
-Medim sized: 7.96 GB of 10,480 files (each averaging 796 KB)
-Small sized: 2.86 GB of 68,184 files (each averaging 44 KB)
The source or target in reading or writing on the drive is a RAID of two Raptor 150 GB drives, so as not to be limited by this.
The first surprise was that although the 7200 rpms have an advantage for reading large files, once you drop down to medium-sized or smaller files, performances are very close. Activation of AAM doesn’t really have a negative impact on speeds.
For writing, things are a bit different, with the 5400 rpms performing less well both for large and medium-sized files. Overall, the Samsungs are faster than the Westerns, so much so that for writing small and medium-sized files the EcoGreen is in front of both the Caviar Black and even the VelociRaptor! Here again the impact of AAM is virtually zero.
Several things are worth noting. Whatever the files, the Samsungs are faster, with a clear advantage with the 7200 rpm version in the case of medium-sized and large files. With the Westerns the performance difference due to rotation speed is lower and the 32 MB version is strangely notably slower with large files than the 16 MB. Again with the Westerns, AAM has a significant impact on performance.
Far copying is the most taxing for the drives when manipulating single-user files. Samsungs advantage is less here and once again the Western Green 32 MB and even the Western Black give strange results with large files.