Jim Handy of The SSD Guy comments:

The following guest post was contributed by Doug Dumitru the CTO of Easy Computing Company (EasyCo), a software R&D company which develops and markets SSD performance enhancement solutions

It would appear that you could build an all-SSD array by simply replacing all of the HDDs in a cabinet with SSDs.   I tried that and ran into some surprising issues that were very confusing at first.

The move toward SSDs is accelerating, especially now that builders are creating huge RAID arrays and other constructs.  Better get your power sorted out, because once SSDs die, there’s no coming back.

Read more at: Solving SSD Power Spike Issues