AIDA64 Random Access Time
Version and / or Patch Used: 1.60
Developer Homepage: http://www.aida64.com
Product Homepage: http://www.aida64.com
AIDA64 offers several different benchmarks for testing and optimizing your system or network. The Random Access test is one of very few if not only that will measure hard drives random access times in hundredths of milliseconds as oppose to tens of milliseconds.
Drives with only one or two tests displayed in the write test mean that they have failed the test and their Maximum and possibly their Average Scores were very high after the cache fills. This usually happens only with controllers manufactured by Jmicron.
The LSI SandForce architecture doesn't use DRAM to store user or page table data so the latency is a little higher than some of the other controller designs. The Vector 3.20 has a little higher read latency compared to the Intel 520, but the 5-Series firmware is responsible for some of that.
We observed the same thing with the write latency, too. Compared to other SandForce based drives with 25nm and 5-Series firmware, the write latency is about the same. The Intel 520 used firmware based on 3-Series and we feel it is a bit faster in several areas.