to get your attention first:
Read IO's per second 8kb 32kb 128kb
Raptor: 126 194 146
SCSI 298 407 416
Flash 1000+ 641 232
I posted a question earlier asking if anyone had seen a review of corsair's latest 8gb GT model flash drive, supposedly it is very fast. It didn't attract much interest or any responses but I have found an article on flash drives in general which, if I do the math correctly, shows several flash drives doing random IO of 8kb blocks at a rate of 1000 IO/s per second.
now if I read storage review correctly, and I may not have, the raptor is capable of only 126 8kb IO/s per second, and the fastest SCSI drive (a 15Krpm seagate) is capable of 298, 8kb IO/s persecond.
again at a 32kb block size, the fastest flash drive in the review (..which I don't think is the fastest one available anymore... someone please do/find an IO reading for corsairs 8gb GT model..) beats the fastest 15Krpm SCSI by 50% in reads
at 128kb blocks, the scsi really hammers the flash drives reading ability, although the flash still outperforms the raptor.
on writes, which is not something I'm concerned about for my purposes, the flash drives reviewed are far far slower, say ~50 IO/s per second at 8kb. Interestingly Corsair are claiming the write spead on their new "GT" range is almost as fast as the read speed.. and both speeds are significantlly faster than the results in xbitlabs reviews.
I'm looking at the file server IO pattern on SR, I havn't looked to see what pattern xbitlabs are using.
well, any way its only cheap I guess if your database or whatever can fit on an 8gb flash drive, lol.