John R Pierce wrote: > On 11/2/2017 2:18 PM, m.roth at 5-cent.us wrote: >> We have a fair number of SAS 3.5" drives, and yes, 10k or 15k speeds. > > those are internally 2.5" disks in a 3.5" frame. you can't spin a 3.5" > disk much faster than 7200 rpm without it coming apart. > Sorry, that's incorrect. I have, sitting here in front of me, a Dell-branded Seagate Cheetah, 600GB (it's a few years old) 15k 3.5" drive. mark