I am experiencing a very strange problem with my DS3512 dual controller. I have two hosts IBM x3550M4, with Windows 2012 and one LSI SAS HBA. Because I have now only one HBA on each server, I have connected both mini-SAS cables to controller A.
I used the Mega-RAID LSI software to correctly identify the WWNs for creating the hosts. I created a storage partition, created the two hosts, and a LUN. I mapped the LUN to the hostgroup, in order to be shared by both hosts. The LUN is using the A controller for ownership/preferred path.
Inside the Windows 2012 servers, the LUN is correctly identified an seen by both.
This is where the problem begins: the logical unit is acting as if it were two completely different disks. If I create a file or folder in one server, the other server does not see any changes. I went to the other server and made the same test, and files and folders are only seen by the server that was created.
I tried another LUN, this time with FAT file system in order to avoid things like ownership and permissions, but the result is exactly the same. Files and folders created are only seen by the server that created the file or folder. Very strange!
Thanks in advance,