In 14 hours I'm supposed to be doing a 50 minute presentation on Mac backups at a Mac User Group meeting. And wouldn't you know it, an external HD I partitioned for Time Machine & CarbonCopyCloner has run into problems on the Time Machine partition & refuses to back up.
Only one solution after TechTool Pro & DiskWarriors timed out when trying to fix the partition: erase & start again.
I have other Time Machine backups & the clone is a just a full copy of the Mac's startup drive anyway.
Erased & repartitioned the drive, Time Machine and CCC are both backing up to their respective partition.
I also told CCC to resize the Clone partition to allow for the creation of a Recovery partition as well.