On 2013-06-01, Stan Hoeppner [off-list ref] wrote:

Today "HDD" can mean either mechanical hard disk drive or SSD. To easily
differentiate, it has become commonplace to refer to mechanical hard
drives simply as "rust" because it's quicker to type and universally
understood.  If this is the first time you're seeing this term that's a
bit surprising.

I think this is the only list I've ever seen "rust" used in this way.

--keith

-- 
kkeller@wombat.san-francisco.ca.us