RAID Block Size for SSDs?

[JesterJJZ]

I've looked at other threads but see so many mixed answers.

I'm putting two Intel 80gig SSDs in my MacPro for boot in Raid0. What's the proper Raid block size to use. I'm assuming smaller in SSDs?

 

[nanofrog]

128k for Intel SSD's.

 

[Altimeter88]

I've looked at other threads but see so many mixed answers.

I'm putting two Intel 80gig SSDs in my MacPro for boot in Raid0. What's the proper Raid block size to use. I'm assuming smaller in SSDs?

I have the same drives as you in RAID 0, I did a few google searches before doing it and I ended up going with 128K block size. I can't find the link but something to do with the x25m erase block size being 128K and wanting to match that.
Anyway my system runs great with this setup. Here is a screenshot I just took:

 

[VirtualRain]

+1 on 128K... I did a lot of research into this when I first got my drives and due to the write erase block size you want as large a stripe as possible to minimize write amplification. Most first gen drives had write erase block sizes of a brutal 512K while the Intels were reported to have block sizes of 128K. I'm not sure what current gen drives like Sandforce are using, as it's not a published spec that Ive seen, but you ideally want the stripe size to match the write erase block size or be as large as possible otherwise for optimal write efficiency.

 

[JesterJJZ]

128k it is! Thanks guys!