Sure, but that's a hack - you can scavenge some data in some cases but you have no guarantees (or even high likelihood) of getting the stuff you want. SSD para

Sure, but that's a hack - you can scavenge some data in some cases but you have no guarantees (or even high likelihood) of getting the stuff you want. SSD parallelism is important for its effect on throughput and latency. If you're reading a database index to satisfy multiple queries, and you need to read in leaves from totally different disk locations you can do it in parallel in SSDs. This has huge potential to improve performance (once databases get around to taking advantage of this).