Performance in Intel IOMeter WorkStation Pattern
Now let’s pass over to WorkStation pattern, which imitates active user work in various applications in NTFS5 file system:
The situation is pretty typical of RAID 0 arrays: the more HDDs are used to build the array, the faster it processes the requests. As for RAID1 and RAID10 arrays, they are at least a little bit faster than a single HDD and RAID 0 array made of 2 respectively.
There are quite a few random write requests in WorkStation pattern, which reduce the performance of RAID5 pretty noticeably. But in this case they have simply buried RAID5 array completely.
Let’s compare the performance of RAID arrays of different types. The ratings for the WorkStation pattern will be calculated according to the formula below:
Performance Rating = Total I/O (queue=1)/1 + Total I/O (queue=2)/2 + Total I/O (queue=4)/4 + Total I/O (queue=8)/8 + Total I/O (queue=16)/16 + Total I/O (queue=32)/32
As we have expected, random writes allowed RAID1 and RAID10 arrays to outperform only a single HDD and 2-HDD RAID0. As we have expected, RAID5 arrays were the slowest of all here.