External HD not working after updating to os x maverick 10.9.2
I have a late 2010 macbook pro just updated to os x mavrick this week. My toshiba external hardrive was working fine with os x moutain lion. the hard drive is showing up under disk utility and is working fine on a frineds macbook he also is running Mavrick. I have run disk repair and verified the disk useing disk ulitilty. The only thing i can not do verify disk permission. Has anyone had any similar problems or know how i can fix this issue. I have apple care but i am deployed at the moment nd can not make it into a store. thanks in advance for any information.
MacBook Pro, OS X Mavericks (10.9.2)