Sharepoint site collection administrator lost full permission issue

Administrator Lost his full permission!!

It happened with me that I tried to use the sharepoint designer as administrator & didn' get the persmission (got a pop-up error). Then I noticed that even on main Sharepoint website I couldn't use the administrator full permissions, though I found it s still has the same permission.Soooo frustrating!!

Well, after search, I found that is is due to the Size quotas of your content DB site.

Immediate Solution: Go to central administration-- Application Management -- the Site Collection -- configure quotas & locks--then pick your web application & make sure it isn't Locked or Read Only!

The reason: if the backup is interrupted whilst writing to the SQL DB you may get this issue occurring,