Summary: The title for this drive says 7200 rpm. Is this a typo? It has the same product ID as this: http://www.amazon.com/Seagate-SATA-Cache-Drive-ST4000VN000/dp/B00D1GYO4S/ref=pd_sim_sbs_pc_1?ie=UTF8&refRID=0NJ3ABS42NMDKG8XED17 Anybody know for sure?
Summary: I own three of these drives, two in my NAS and one as a spare drive / backup drive. It's always important to make sure you match specs on drives when using them together, and the easiest way to do that is to buy multiples of the same drive. Other review sites have listed these drives as average with regards to failure rates, but I trust the Seagate brand.
Summary: Time will tell on this drive when I am more concerned about longevity than read and write speeds. The fact that this is an NAS drive should helpfully ensure longevity and be a bit more rugged. I am using this as an external drive over Firewire 800 to clone my main drive and to provide a backup. Although considering it's performance I am thinking of making it a Time Machine backup drive for use with OSX. That might be a better use case for it for my needs.
Summary: I don't see the info elsewhere on Amazon.com, but this is a 5900 RPM drive, like many a "green drive" Seagate and WD produce that has this same speed. This is a so-called NAS drive because it supposedly features better fault-tolerance internally and includes a suite of technologies called NASWorks that Intel says improves performance and drive health. This drive can easily be used as a regular internal drive in a desktop PC.
Summary: This drive is plenty fast for backup, video/photo storage or even as a primary drive if you need one. It's amazing how fast you can fill up a hard drive with video and photos these days. My PC came with two 10k rpm 500 gb drives in Raid 1 and they were filled up in no time at all. I got a backup drive but I still needed more space for storage dedicated just to videos and photos. This was the answer.