Repaired system-Backup from clone or old before replacing?

[macmesser]

I had a consistency error on my system drive which neither Drive Genius nor Disk Utility could fix. I cloned the High Sierra system SSD with Bombich CCC to an internal HD which had been wiped and APFS formatted and found it to be bootable, as expected. The next step will be to reformat the old system SSD and clone the new system HD on to it, but first I want to use Time Machine to back up the old system SSD (which BTW, is bootable and seems to be running fine despite the consistency error and warning to repair asap). I can boot from either the old or newly cloned system to backup the original system. Which option would be preferred, if either, and why?

 

[Fishrrman]

"The next step will be to reformat the old system SSD and clone the new system HD on to it, but first I want to use Time Machine to back up the old system SSD"

If you have already cloned the drive, there's no need to do this.

The CCC cloned backup is "all you need".
It will work BETTER THAN a TM backup.

 

[macmesser]

Thanks for reply. That's what I used.