I'm currently unable to backup via Time Machine, as backups fail with the following error message:
"Time Machine couldn't complete the backup to "Time Machine"". "The backup disk needs 4.50 PB for the backup but only 337.69 GB are available. Select a larger backup disk or make the backup smaller by excluding files."
If I go into Time Machine Options, the estimated size of a full backup is 266.14GB. The source volume is only 500GB.
Things I've tried already:
- running Disk Utility First Aid on both the boot volume (the one to be backed up) and the Time Machine disk
- restarting the Mac
- checked the Time Machine disk is included in the "Exclude the items from backups". It is.
Does anyone know why Time Machine might be massively over-estimating the size required to complete a backup?
4.50 PB is 4,500 Terrabytes, right?!
- I'm using macOS 10.14.3 (up to date as of the time of writing)
- the boot volume is APFS (Encrypted)
- the Time Machine Volume is Mac OS Extended (Journaled, Encrypted)
I have now discovered the following file which shows as 4.5PB:
ls -l ~/.android/avd/Nexus_5_API_26.avd/cache.img.qcow2 -rw-r--r-- 1 notmyrealusername staff 4503601804345344 7 Feb 14:34 /Users/notmyrealusername/.android/avd/Nexus_5_API_26.avd/cache.img.qcow2``` if I run `file` on this file: ```file ~/.android/avd/Nexus_5_API_26.avd/cache.img.qcow2 /Users/notmyrealusername/.android/avd/Nexus_5_API_26.avd/cache.img.qcow2: QEMU QCOW Image (v3), has backing file (path cache.img), 69206016 bytes
And yet the SSD holding the file is only 500GB
df -h Filesystem Size Used Avail Capacity iused ifree %iused Mounted on /dev/disk1s1 466Gi 241Gi 221Gi 53% 3704178 9223372036851071629 0% /
How is this possible?