[CentOS] is it safe to resize root, on an LVM system, online?

[Gordon Messmer]

On 07/12/2010 02:07 PM, Keith Keller wrote:
>
> If I'm reading the man page correctly, -e will umount the filesystem
> before resizing, which is not what the OP wants.  (It might work by
> leaving out -e.)
>    

Yeah, my bad.  Don't use -e. ;)

You can't umount /.  I'm not sure if fsadm would go ahead since unmount 
isn't required (you only need to unmount an extX filesystem to shrink 
it), or if the tool would exit and tell the user not to use -e.