Does your server pass all the tests under Site administration > Server > Environment?
The $CFG->dataroot not accessible shouldn't happen at any time. For some reason your server is unstable. You say it goes away when you restart? Does this happen under load, when there are many active users?
The $CFG->dataroot not accessible shouldn't happen at any time. For some reason your server is unstable. You say it goes away when you restart? Does this happen under load, when there are many active users?
P.S. Please consider attaching screen-shots of a reasonable size - not everybody does have a panel like a Boeing cockpit.