Mostly likely time a hard drive will fail?

1. When booting the drive.
2. During operation - none/minimal activity
3. During operation - heavy activity
4. When moving/physically handling the drive
5. When newly bought - first time booting
6. Other?

>>9
-incredible luck if your statement of a constant use is true
-crue design, modern drives are much more miniaturised and complex. -> more affected by heat and abrasion
like comparing a wristwatch with a sundial...oh well that is maybe a bit too exeggerated