When the Tottenham manager (FYI: Harry Redknapp) picks his starting 11 before a match, he also chooses 7 additional players to sit on the bench. As backups. If ie. a player gets injured during the game, he always have a backup he can use that is sitting on the bench. Just waiting to be substituted.
What do you do if you got a flat tire in the middle of nowhere, and you find out that there isn’t a spare tire in the trunk? “Sh*t, I thought I had a backup!”
An OU with dozen of user objects can accidentally be deleted. Your single DC in the domain can say goodnight anytime (yeah right, who has the guts enough to have a single DC in his domain?!). Your SYSVOL with all your fancy GPOs vanished. “Hey! Where did they go?”
So, just like everything else, a good backup can be very good to have. Even in the Active Directory world. I quote Instan at the Microsoft CSS/PSS:
As my grandfather used to say, “it’s better to have a backup you don’t need than to need a backup you don’t have”
If you don’t have a backup routine of your domain controller, then now is a good time to implement it.
A quick way to see when the last backup occurred. Open cmd and type:
repadmin /showbackup *
(Repadmin is part of the Windows 2000/2003 support tools)
I have scheduled a System state backup running every night on three of my DC’s in the domain using NTbackup (or Windows backup). (We also have a Tivoli backup running that backup the entire server…Paranoid you know 😮
I store the backup files on a network share for easy access (by the admin *).
The name you give the backup file can be in great help for other admins to do a restore.
Naming of the backup file: http://technet.microsoft.com/en-us/library/cc785766(WS.10).aspx
Schedule System state backup: http://technet.microsoft.com/en-us/library/cc759092(WS.10).aspx
If you at least have a System state backup and a disaster do occur. Then you’ll probably be able to restore your domain back on track. Just be sure that backup file have not exceeded your domain Tombstone Lifetime (60 or 180 days).
* Security around how to protect the backup is out of the scope for this entry.