2010/10/29 Bruno Wolff III <bruno@wolff.to>
On Fri, Oct 29, 2010 at 17:35:54 +0300,
 cornel panceac <cpanceac@gmail.com> wrote:
> > not yet, if possible i'll create a bug tomorrow. the behaviour is like
> this: i boot rescue environment, maybe yum update the system to be rescued,
> then reboot on the then reboot. ""Superblock etc" then immediately "file
> system relabel is required". this happened several times today on a system
> which was dvd upgraded from f13 to f14 rc1. the relabel doesn't show up when
> i just rebooted the system.

There might be two problems. The superblock timestamp may have to do with
timezone settings and how you have your bios clock set. If the rescue
image and the normal image have different ideas about what the time of
the bios clock means (say one assumes it is UTC and the other assumes it
is localtime) I think you could see a symptom like this.

For the update / selinux relabel issue, if you write to file systems
with selinux disabled that is going to trigger needing a relabel.

this happens without any writing (that i know about) occuring. just enter and exit rescue mode, with the partition(s) mounted rw.
 
I think
it is normal for updating stuff while using rescue mode to trigger a relabel,
as if the policy of the rescue image weren't to match that of the installed
system, when you did an update files could get incorrectly labelled.