Waiting for device
/dev/disk/by-ID/scsi-sata-st3500830NSAR0-5qg03f64-part2 to appear.

I get this message when trying to boot.

I made an exact copy of a drive, using dd, and this is the message that
I get if I try to boot the copy. It sounds like the boot image is
looking for an exact drive match, down to the serial number? Is there
an easy way around this? I was hoping to be able to occasionally
mirror this disk, but maybe not?