I have a 12TB external drive on my 2019 MacPro which I use for Time Machine backups.
Backups work fine, but it takes between five and ten minutes for my system to restart and log in after providing my credentials – and the 12TB Time Machine APFS volume mounted by macOS is completely exhausted.
Until the TM drive is mounted apps won’t launch and my system is basically “frozen” – I can try to run things but they bounce for several minutes until the TM drive is mounted in the Finder.
I suspect that the size of the drive and the number/types of files means that whatever the fsck process does for the APFS volume just takes a while to do what it needs to do.
If I disconnect the drive and reboot, things are as fast as expected.
But with the TM drive attached, macOS has this huge delay when mounting the TM drive.
The drive is plugged into a CalDigit TS3 Plus hub, but the experience is the same when plugged directly into the MacPro.
Short of erasing my TM saves (not an option) or switching to SSD (financially unpleasant option), does anyone know of a way to speed up this process? I’d like to stick with APFS as my filesystem, rather than revert back to HFS+, but it’s getting frustrating to wait over ten minutes every time I reboot for the TM drive to mount and my system becomes usable.
I’ve tried reporting this via Feedback Assistant for a while (including macOS 12 betas), but crickets.