moving from multidisk system to single disk system

I have several disks that I’ve accumulated (for space) on my system, and would like to consolidate these to a single large hard drive. My plan is the use PING or Clonezilla to clone my largest (main 500GB) hard drive to a 1 - 2 TB hard drive, and I think these can also move the other partitions sdbX, sdcX and sddX to the same hard drive, but I have to tell the system I did this or it won’t boot.

AFAIK: I need to do this in fstab, but where else? Also, since the “new” drivers use the disk SN/ID, how to deal?

THANKS!!!
Patti

BTW: The reasoning is that I would only have to back up (and/or replace) one piece of metal in the event of a crash.