10-24-2010
918,
62
Join Date: May 2008
Last Activity: 26 July 2013, 11:43 AM EDT
Location: Northeastern United States
Posts: 918
Thanks Given: 1
Thanked 62 Times in 59 Posts
Most times, you cannot roll back. However, you should have a good backup of your system if you intend to do an upgrade.
One method involves pulling a mirrored drive before the upgrade and then recovering by removing the drive where the upgrade failed and booting from the original mirror drive.