We are going to use Intel Modular Server for virtualization purpose. It has an integrated SAN storage and we are considering using SSDs. The windows servers to be virtualized are mostly SQL server 2008.
Why is there a concern of sequential or random write? For SSD, read is not much issue, it's just too fast compared to traditional HDD, even SAS can't smell the smoke. However, at the moment, there are 2 types of SSDs optimized for different kind of operation. 1 is good for sequential write, wheres Intel is optimized for random write.
therefore, understanding the file I/O pattern will help us in choosing the type of SSDs as our SAN storage media.