[CentOS] Hot swap SATA?

Should it be possible to hot-swap SATA drives with Centos5?  It doesn't 
seem to work on my system.  Removing an unmounted drive locked the 
system up, and leaving one out at bootup makes the devices change names 
and keeps grub from finding /boot on a scsi drive that is shifted up.

-- 
   Les Mikesell
    lesmikesell at gmail.com