Recover from a crash
 

I had Redhat 8 installed on one hard drive and suffered a crash. I tried everything I could think of, but finally resorted to re-installing on another hard drive so I could get some files from the old system.

I've re-installed and everything works fine. However, when I connect the original hard drive as a secondary master, the computer appears to boot from that system again, and I get the same errors I had before I reinstalled. Why is this happening? How do connect the old hard drive to retrieve my files?

Thanks for your help!

Clarification: Here is the error I receive after adding the second hard drive:

Ext2-fs: ide(22,2): couldn't mound because of unsupported optional features (4)
mount: error 22 mounting ext2
pivotroot: pivot_root(/sysroot, /sysroot/initrd) failure: 2
umount /initrd/proc failed: 2


Where do I go from here?

Thanks! :)

are the "jumpers" on the second hard drive set on "slave"??