[ubuntu] unity ssh bash intermittently freeze when accessing samba cifs shared folders

Has anybody else noticed that on occasions unity, bash, and ssh freeze when you issue some kind of bash command (e.g. ls) on a folder that is mounted with Samba CIFS. It appears that there is some kind of File System issue. Rebooting seems to fix the problem, but many times the only way to get it to reboot is to hard reset the box since when it freezes there's no way of issuing a reboot command. Not only does the server freeze where the initial command (ls -Fals /share) was executed, but if I try to ssh into the server from another machine, it will freeze as well as soon as it logs in. This is happening on a server that is ruing 14.04. the CIFS mount is on a hardware RAID array.

I see a lot of these messages in the /var/log/syslog

Jun 27 22:10:41 lic1 keel: [2588674.770711] CIFS VFS: Server 10.1.10.10 has not responded in 120 seconds. Recoecting...