/gnu/store/ corruption on crash

[Danny Milosavljevic]

Hi,

I've got a problem on an X200 where, after I did standby 3 times, it will wake 
up fine but at the first larger disk access hang the machine.

This E-Mail is not directly about that problem.

However, this time, guix did package install when that happened and now 
/gnu/store/ is corrupted.

/gnu/store/7k7wicjr8rpb65h2f33j8ibpmffwjp6d-fontconfig-2.11.94.tar.bz2.drv now 
has 0 Byte.

Should it be possible for that to happen?

UNIX journalling filesystems in general only provide guarantees for filesystem 
metadata, not file content. Is this taken into account? (f.e. don't overwrite 
existing file but rather create new file, rename atomically; is fsync done when 
important?)