|To clone/copy a failing drive there's some evidence that giving it a good chill by putting it in a freezer for awhile before doing the transfer will help. Be sure it's wrapped tight while in the freezer so no condensation seeps in.|
What worked for me once with a really old MFM drive was to push down on the top of the drive while it was copying.
But if it doesn't seem to be spinning up, or is spinning sporadically, make sure the power connection is good. Sometimes the metal terminals get flared out and don't make good contact.