No, but backup immediately!
Sure you had the correct jumper settings with the sled?
I think you best get another drive and copy all data to it. You may experience problems with the copy.
Here are two utilities for making a complete backup of your internal hard drive. I've recommend using one of these so that you can create a bootable system on your external hard drive. ( PPC require a firewire connected drive. ) Once created, you can run your system from the external drive. Hold down the option key on your keyboard then power on your machine. This will bring you in startup manager click on the drive image you wish to boot then click on the arrow key to the right.
"Clone, synchronize, backup. Schedule and forget it."
"SuperDuper is the wildly acclaimed program that makes recovery painless, because it makes creating a fully bootable backup painless."
All is well. It was the pins. The second drive - the non-system drive - was the master, on the bottom, marked with a single pin horizontal along the bottom. The system drive was on top with to vertical pins on the side. I just removed the non-system drive and this time I made the pins in the system drive match the non-system drive.
Migration is working beautifully now.
Good mercy, I'm glad 1999 is over.