X25's in raid. What is the optimum stripe size?

[Ao1]

There is something wrong with your onboard controller it seems. The adaptec card just about DOUBLES the latency of the X25-Es. It reduces their small random and sequential reads by about 50%. It is a big bottleneck for those SSDs. My ICH9R is working perfectly fine, 500MB/s reads 390MB/s writes in Atto.

Hi One_Hertz,

From my experience read/ write benchmarks are not indicative of how a SSD drive will perform in real usage.

I guess that X25e's are completely overkill for a home rig, but I wanted to switch over to SSD and having tried the OCZ core it seemed that you had to let go of the cash if wanted a SSD to perform any better than a laptop HDD. (That statement is based on user experience. Advertised read/ write speeds are nothing to go by in terms of real time performance if the OCZ core is anything to go by. The drive just locks up when under any pressure and overall you get the experience of using a slow laptop HHD.)

Having spent the cash for the X25e's I'm really happy with them, but I would like to know if they are set up to the run at their fastest and the strip size seemed to be the only way possible of tweaking them.

It seems a bit ironic that SSD are really good at large file reads, when having large files is not an option due to the small size of the drives I'm much more interested in small read/ write performance and high io's.

Going back to onboard controllers is not something I want to do as the 5405 is so much more stable and seems to help overall PC performance. Have you tried smaller or higher strip sizes? Did it make any difference?

I curious about why you think that the 5405 will reduce small random and sequential reads by about 50% and double latency. Is this something you could explain in a bit more detail?

Thanks in advance.