Trouble with FC SANs
Posted on 2014-11-28
I have an older IBM X 366 server that we have attached to an IBM DS4700 FC SANs. The server has two Qlogic HBAs.
I have accessed the SAN using the IBM storage manager and I have created an array and single LUN set to be used with Windows and initialized the "disk". I have created a group and mapped the array to the server. The SM software sees the HBA WWNs OK. When I boot the server initially it saw the disk as two disks; one that I could initialize and one that I could not that were the same size. I did some research and added the MPIO feature to the server. Now when I see the disk I only see one, but I cannot initialize it. I get an Incorrect Function error message. I played around with the MPIO settings and found what when I changed it from Round Robin to Failover I could then initialize the disk and it gets assigned a drive letter and is formatted. However, if I change it back to round robin it becomes uninitialized again. Even when I set it back to failover it stays that way. If I reboot and then set it to failover, I can again set it up.. However, if I then reboot again, not doing anything else to the disk, it goes back to an uninitialized state and once again I cannot set it up.
Any thoughts? Thanx...