The steps that you should follow;
1-Turn off X Serve
2- Turn off X Raid
3- Pull out all Raid drives from X Raid
4-Turn on X Raid without the Drives
5- Wait X Raid to be completely ON.
6- Turn on X serve
7-See fiber channels link up on Raid Utility ( you should have ethernet connection to X Raid as well for administrative purpose)
8- Plug in only one side of the Raid Drives first and see if it mounted.
9- Plug in second side of the Raid Drives
I hope it helps