crwdns2934241:0crwdne2934241:0 matthewfrey

crwdns2934249:0crwdne2934249:0:

Its called a Prohibitory sign,  

http://support.apple.com/kb/TS1892

if the Partition scheme is not GUID or Apple Partition Map -  its a good chance that not all the files actually copied over.   

I would recommend erasing the external drive,  make sure its GUID, and the partition itself is OS Extended Journaled. 

crwdns2915684:0crwdne2915684:0:

open