How to list deleted files?

[Gwouigwoui]

At the moment I'm using beet update -p | grep -B 1 "deleted" to list the files that got deleted from my library. It's working, but I feel like it's inefficient, as it's my understanding that update will read the metadata of each file.

Is there a better way?

[DjSlash]

Beets does not track if files get deleted. That's why you need to run beet update to let it detect that files are no longer there, so it can delete the records in the database. You could use beets to delete files and update the database simultaneously. See beet remove.