9.1 Feature: Multiple Boot Environments
If you’re using ZFS (or looking for a reason to do so), one of the new features in 9.1 is support for multiple boot environments. Imagine the following scenarios:
- you upgrade your operating system, hate it, and wish you could go back to the old version
- you upgrade some software which breaks something else
- you want to perform some tests without permanently affecting the files on your current operating system
Multiple boot environments make those scenarios do-able in two easy to use commands. Before making changes to your system, simply use the beadm create command to create a copy of the current filesystem. Do your stuff. To go back to what the system used to look like, use the beadm activate command to instruct the system to boot into the copy of the previous boot environment and reboot. It really is as easy as that!
Documentation for multiple boot environments can be found in this page of the upcoming 9.1 PC-BSD Users Handbook. This feature became available with the 9-STABLE 20120622 snapshot and will also be in the upcoming BETA1.
Trackback from your site.