i plan to use flash drive for part of data that can 500MB/s linear and abour 400MB/s in planned workload. The overhead of software encryption IS BIG.what is low in your opinion. i found it not that much faster anyway - like 150MB/s per coreI'm currently seeing about 90MB/s writes to disk without encryption, and iirc when I tried it I was seeing something like 70MB/s with softraid crypto (i7-2640M).
for magnetic hard drives it is not a problem usually.

