On 6/23/2014 9:41 AM, Stephen Adler wrote: > drives) and are the favorite for data centers. But there's a factor of 3 > difference between the storage capacity and size. so the problem is that
A 24x2.5" storage box takes up three rack units plus one for a server. A 16x3.5" storage box takes up 6-7 units plus one for a server so for the same space that the 3.5" box uses I can have 48x2.5" disks. 7 units for 48TB of raw capacity vs. 7 units for 96TB raw capacity. That's a factor of 2 at most and only with very expensive 6TB 3.5" disks. The factor drops to 1.3 with 4TB 3.5" disks and is even on with 3TB 3.5" disks. There's the performance gain. Three 2.5" 7200 RPM disks together are substantially faster than a single 3.5" 15K RPM disk for less power and less heat which saves money on cooling costs and is good for drive longevity. Dell still offers most of their *Vault line with 3.5" options. There are also plenty of bare chassis out there to build your own. -- Rich P. _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
