According to the linear read speed in the beginning and in the end of the logical drive our controllers got positioned as follows:

You can see the graphs if you click on the corresponding link below:

• RAID0 on 3Ware 8500-4 (Graph)
• RAID0 on Adaptec 1210SA (Graph)
• RAID0 on HPT RR1520 (v2.33s) (Graph)
• RAID0 on HPT RR1520 (v2.33s) (Graph)
• RAID0 on Intel ICH5-R (Graph)
• RAID0 on Promise FT SATA 150 TX2 (WB) (Graph)
• RAID0 on Promise FT SATA 150 TX2 (WT) (Graph)
• RAID0 on SiliconImage 3112 (Graph)

I strongly recommend taking a look at the linear read graph for HPT RR1520 controller tested with 2.34s driver version.

The Average Access Time results are given in a separate diagram for your convenience:

Of course, those controllers, which drives have to do some additional things to each request before processing it during random reads, do a lot of useless work. In other words, they fail to speed up the work of the array (because the requests go to sectors with random address), and at the same time spend time on requests processing anyway.

Now we will take a look at FAT32 file system and the performance of our testing participants there:

As we see, nothing has changed: the first one is still HighPoint with 2.33s driver and the other controllers perform almost equally fast.