Are Hard Drives Hermetically Sealed?

Well, there’s one sure way to find out.  Drop it in a bucket of water and wait an hour.  If it is hermetically sealed, the drive won’t leak any water inside.  If it isn’t hermetically sealed, then it’ll probably be full of water.

No, really don’t try this!  It will ruin your hard drive.  The short answer to the question are hard drives hermetically sealed is……