I am getting a ton of these errors (over 100) when I run Disk Utility First Aid on the Fusion Drive of my late-2012 iMac (see attached). They do not resolve when I run First Aid multiple times. What should I do about these errors, if anything? Thank you
It then ends with: "Operation successful."
iMac 27", macOS 10.14
I've seen the problem reported before on Fusion Drives. Since Disk Utility completes with "Operation Successful" I don't think there's actually a problem. But you can run DriveDx to double check. DriveDx is a more robust utility than DU. If you need any help interpreting the report you can post it here.
Run First Aid from Recovery Mode:
I saw that somewhere else too -- a person saying that these errors can be disregarded because the process ends with a green check saying that the disk is okay.
Many thanks
Thank you macjack. Yes, I've run this from Recovery and got the same errors.
Just to be clear, by Recovery I mean that I rebooted pressing Cmd-R, chose Disk Utility, chose the full Fusion Drive and clicked First Aid.
After doing the above I got those errors.
You're welcome.
Disk Utility FIRST AID error: "Mismatch between extentref entry reference count"...
