Performance in FC-Test
For this test two 32GB partitions are created on the virtual disk of the RAID array and formatted in NTFS and then in FAT32. Then, a file-set is created on it. The file-set is then read from the array, copied within the same partition and then copied into another partition. The time taken to perform these operations is measured and the speed of the array is calculated. The Windows and Programs file-sets consist of a large number of small files whereas the other three patterns (ISO, MP3, and Install) include a few large files each.
We’d like to note that the copying test is indicative of the array’s behavior under complex load. In fact, the array is working with two threads (one for reading and one for writing) when copying files.
This test produces too much data, so we will only discuss the results of the Install, ISO and Programs patterns in NTFS which illustrate the most characteristic use of the arrays. You can use the links below to view the other results:
The arrays take proper standings when creating files, but have rather too low speeds. Of course, the RAID0’s 254MBps looks good, but it is an 8-disk array and we can expect it to be three times as fast as that!
The same goes for the second set of arrays: the standings are normal except for the too modest results of the 8-disk RAID6, but the speeds are overall too low.
Thus, writing is definitely a weak point of this controller, at least with the current version of its firmware.
It is somewhat better at reading, but there are a few odd things here. For example, the 8-disk RAID0 is inferior to the 4-disk RAID0 with the Install pattern. The RAID10 arrays all have the same speed with this pattern, which is queer.
Reading from the checksum based arrays is not without surprises, either. The Install file-set is read faster by the 4-disk RAID5 rather than by the 8-disk one as we might expect.
Take note that the degraded arrays deliver faster speeds with the large files of the ISO pattern than the single HDD, but lose to the latter with small files.
The 8-disk RAID0 is unexpectedly good at copying files within the same partition. While the other arrays show similar speeds and equal same-type arrays built on opponent controllers, these array and controller deliver twice the others’ performance.
The RAID5 and RAID6 arrays pass the copying test successfully. The standings are logical and the arrays all deliver high speeds, except for the 4-disk RAID5 in the ISO pattern.
The results do not change much when the arrays have to copy into another partition. Every array copes well with this job.