when we use an external disk, we chown 777 the mountpoint so that the
yellowtent user can write to it. the files are created as the 'yellowtent'
user.
when this disk is attached to another server for a restore, the new server's
yellowtent user may not be able to access the files if the uid does not match
between the old and new server.
for this, reason hardcode the uid
e6c43c84e4