apparently you dont share luns without a cluster, how do you close this thread 
We have server a, b, c  and lun0 1 and 2.   All three hosts have acces to all 3 luns.  If I am on server a and add a file to lun0 server b and c dont see it.  And then within minutes the data is corrupted.  This is a new setup    any ideas?  I worked with prof services to set it up and he seems baffled
3 r640s connected to 3 luns on unity 380