On 6/18/2016 12:09 AM, alireza baghery wrote: > i have two server *CentOS 6.5* and > *CentOS 5.9 * > i have one*SAN Storage* on both servers > but when i create file one of server (example Centos 6.5) Other Sever > (Centos 5.9) do not see file > and i must*umount* Disk to seeing files new > how solve this problem > format disk *EXT3* you can't share SAN block storage like that, unless its some special sharable cluster file system (ex*fs is not!). Frankly, I'm really surprised you haven't corrupted this file system already. You want NAS, not SAN for this. Use NFS for sharing files between multiple Linux/Unix systems. -- john r pierce, recycling bits in santa cruz