Server - How to export file share settings and relative permission for disaster recovery

If you a File server and you had problem on share permission you can backup them periodically using following commands:

Backup and Restore of Share Permissions 

Use the Reg tool to backup the registry key from the command line:

reg export HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Shares shareperms.reg

If you need to restore it at some point, just run:

reg import shareperms.reg

Backup and Restore of NTFS Permissions
Use this command to backup NTFS permissions:

icacls d:\data /save ntfsperms.txt /t /c

The /T switch allows it to get subfolder permissions too. The /C switch allows it to continue even if errors are encountered (although errors will still be displayed).
Use this command to restore them:

icacls d:\ /restore ntfsperms.txt

You can find full article here:

http://blogs.technet.com/b/askds/archive/2008/11/24/how-to-back-up-and-restore-ntfs-and-share-permissions.aspx