About a month ago I ran some initial tests of iSCSI SR’s
in XenSource. As a new user I wanted to learn how to set them up and how
they worked. That all went great. Now I am trying to set up our
production environment and am running into problems.
It turns out that when I tested I used the software
initiator and not the HBA’s. The instruction I found said to use
lvmoiscsi but now I see that I should have used lvmohba since we are using
QLogic iSCSI HBA’s. I discovered this because, after these tests, we
moved all of the HBA’s onto a separate VLAN and set up jumbo frames.
Therefore, when I attempted to connect the old way (lvmoiscsi) it did not work,
obviously I was on the wrong network and the network I was on did not support
jumbo frames.
Now when I go to the command line and run:
xe sr-probe type=lvmohba device-config:target=10.1.4.100
I get a more or less empty dev list. All that is returned is
the host, name, manufacturer and id. I do not get any other info.
What am I missing?
I can ping the iSCSI host using the tools in the QLogic software
but only up to a packet size of somewhere over 1450; 1475 and above fails. This
makes me think that the MTU on the VLAN is set wrong which I am looking into
now.
Are there any other checks I should do to narrow this down?
Thanks;
James
James Alspach
Systems Analyst II
Shasta County Office of
Education
1644 Magnolia
avenue
Redding, California
96003
jalspach@xxxxxxxxxxxxx
(530) 225-0293
IT Hotline: 225-0279
hotline@xxxxxxxxxxxxx
