J_RaD - 2:30 am on Jul 21, 2013 (gmt 0)
^^^ read and write are 2 diff stories. SSDs have great read, piss poor write.
grab a few 10k spindle disks and RAID them and you'll be saying SSD wha? they'll read, and write faster and have more storage!
also look up SSD failure rate.... i wouldn't call them "mission critical"