Safe rotation speeds for partially cracked CDs?


#1

What is the approximate maximum speed for CDs to rotate at, which are cracked at the inner edge?

What is the minimum speed for a crack on a CD to grow?

And: Is it any different, if there are multiple cracks?
Does the pressure spread evenly?
Is it different for DVD/HD-DVD/BD? (they do not crack anyways, but just in case.).


#2

Too many variables here to warrant a single answer that covers all circumstances.

I’d say you’re overthinking this.

Put the disc in a desktop-style half-height drive, read at the minimum speed the drive is capable of, make a backup copy and be done with it. :slight_smile: