How much does a drives RPM make a difference?

PapaBear wrote:

If the D-Link is still viable and has not been cannibalized, you could maybe put two 1.5GB drives in it and use it as a server for video files that don't change. I don't know if it will work as a video file server or not, just a suggestion to maybe help pull some of the files off the NV+ to gain some space. Last year when my NV+ was filling up, I bit the bullet and went with an NVX (replaced in the market by the Ultra 4) and just recently had to expand it with 2x3TB drives. When you add the next ReadyNAS, the x-86 units using X-Raid2 have this nice feature of layering the volume so you don't have to replace all the drives. I have 2x3TB and 2x1TB drives replacing the 4x1TB drives and my volume is now 4.5TB instead of 2.7 with the 4x1TB drives. The removed 1TB drives went into my NV+ which serves as a second backup of critical files.

Ironic, PapaBear, that you mention that you went with an NVX. After my last post, I was fooling around with TwonkyMedia Server on the ReadyNAS, as well as with my AppleTVs, TiVos, and Sony TV. In doing some research, I discovered Plex but, much to my chagrin, found out it doesn't work with the NV+ but does work with the NVX and the Ultra 4. I see the Ultra 4 is $530 at Amazon (compared to $656 for the NVX) so now I'm wondering whether I should bite the bullet and get the Ultra. Between the two (NVX and Ultra 4), is there any reason to go with the NVX instead of the Ultra 4?

Incidentally, last night I also discovered may duplicate video (.mpg) files on the primary ReadyNAS. I'm in the process of deleting them to see how much space I can recover. Perhaps I can squeeze some extra life out of the 1.5TB drives I have now.