[SOLVED] Just formatted partition (ext4) is 5.4% used!?

catkin · 11-14-2010, 08:44 AM

Quote:

Originally Posted by jay73

Reformatting a partition typically discards any write permissions you had before.

I don't understand. AFAIK (since reformatting deleted any files) the only permissions are the ones set by the mount command which changes the permissions on the mount point directory if necessary (they are restored on unmounting).

AFAIK the permissions set by the mount command are derived from the command line and/or fstab and not from the file system itself which is permissions-agnostic.

Have I misunderstood?

jay73 · 11-14-2010, 11:00 AM

The point is that a reformatted partition is owned by root; given default 755 permissions, only root has read (4), write (2) and execute (1) permissions; the group owner and others have only read(4) and execute(1) permissions. If you use chown to promote a regular user, (s)he acquires all three types of permission.