On Wed, 22 Aug 2018 00:20:49 +0000, John Nemeth wrote:
...
I believe modern disks are less prone to stiction. However,
the original poster did say these are old disks. The "solution"
is to power it up and "gently" shock it, i.e. lift one end about
an inch and drop it.
It's a bit gentler to pick it up and 'flick' it arond the disk axle.
At least that's how I got a disk startet I bought (used) at the flea market many years ago.