PDP11/23+ frustration

[Tony Duell]

>    If the heads have crashed, they'll create enough drag on the disk that
> it will go into an underspeed condition and that will cause  the heads to
> retract. It will do this even on drives that don't have servo info on the
> disk.

That depends on the drive. I've seen (and repaied) an RK05 that 
headcrashed and carried on running for serveral minutes with the heads 
loaded. Made a right mess of the heads, I can tell you...

> 


-tony