Question: Is my TC hard disk dead?
Time Capsule 2TB, 5th generation, hourly backup for more than 3 years without any issue, it started throwing error 2 days ago: it couldn't complete backup anymore, said "error occurred while copying files".
I tried to format its disk by quick erase (few times), and even zero out data (which took 5 hours), I still couldn't even complete the new first backup, backup started successfully, but always failed after copied around 4GB files, with the same error message "error occurred while copying files".
I can see TC via AirPort Utility, I can login to TC via Finder and see my backup bundle.
Does that mean its hard disk is dead?