Just stopped a git status call that was stuck for hours on the following line:

refresh index:  13% (30610/235456)

That problem suddenly occurred this weekend after I git annex added some files. I haven't called status or anything before, but last time I used that drive it worked well.

Other commands like git commit also just don't do anything and can't overcome a S+ state. Problem happens on both macOS and Linux hosts. Nothing in the kernel log that indicates drive IO problems or something similar.

Any idea what might lead to this?