Why is my loop device not 600G in size?
$ fallocate --length 600G sysvol
$ sudo losetup --find sysvol
$ sudo losetup --all
/dev/loop0: [0831]:13 (/.../sysvol)
$ sudo losetup --set-capacity /dev/loop0
$ sudo stat /dev/loop0
File: ‘/dev/loop0’
Size: 0 Blocks: 0 IO Block: 4096 block special file
Device: 5h/5d Inode: 51 Links: 1 Device type: 7,0