I had some trouble with CCC backup disk corruption and decided to check the main system disk, a 2TB SSD on my Mac Pro 5,1. A couple of observations:
- You cannot just boot into the recovery partition and run First Aid with the Disk utility. The recovery partition is a mounted container of the same disk. Strikes me as counter productive. You have to boot into another system on another physical drive. You can run First Aid on a running system, but that is very slow. You are also not able to do any repairs running from the system disk.
- I used Time Machine and it looks like since it creates a snapshot every hour, there are 24 snapshots. First Aid takes seemingly forever to check these.
These things make APFS more unwieldy, it seems.
- You cannot just boot into the recovery partition and run First Aid with the Disk utility. The recovery partition is a mounted container of the same disk. Strikes me as counter productive. You have to boot into another system on another physical drive. You can run First Aid on a running system, but that is very slow. You are also not able to do any repairs running from the system disk.
- I used Time Machine and it looks like since it creates a snapshot every hour, there are 24 snapshots. First Aid takes seemingly forever to check these.
These things make APFS more unwieldy, it seems.