Now come a few more illustrative graphs:
Note that in case of linear workload (one outgoing request), the single HDD proved faster than a RAID 1 array. And RAID 01 array appeared faster than RAID 0 array of three and two hard drives only if the reads share was pretty big.
As the workload onto the controller increased, the situation got completely different. The mirror (RAID 1 array) is much faster than a single drive in those mode where the reads are dominating, and RAID 01 array in its turn outperforms RAID 0 array of two HDDs almost in all situations. In RandomRead mode (with no write requests) RAID 01 array appeared faster than RAID 0 array of four drives!
All in all, all the advantages of FastTRAK100 TX4 have been fully inherited by the FastTRAK TX4000.
Increasing the workload up to 256 outgoing requests changes the situation a little bit (making the results of RAID 0 arrays a bit better). However, the things are more or less clear anyway: data mirroring arrays turn out very efficient when the share of writes is pretty low.