[dm-devel] NIC and HBA based multipathing
Scott Moseman
scmoseman at gmail.com
Tue Oct 30 16:56:08 UTC 2007
Device-mapper multipathing in RHEL 4
http://kbase.redhat.com/faq/FAQ_51_7170.shtm
I can (and have) setup a NIC based iSCSI SAN connection. I can (and
have) setup an HBA based iSCSI SAN connection. Now I'm trying to get
a machine to connect using multipath with both a NIC and an HBA. What
are the prerequisites that I should have running before I attempt to
go through the above knowledge base procedure?
I put IPs on both the NIC and HBA on the SAN network. The SAN is
showing both IPs as trying to access the volume in question. iscsi-ls
only shows 1 device (/dev/sdb), and it's taking the path through the
NIC to reach the SAN. I can verify this by watching the SAN volume to
see which of the IP addresses is sending traffic.
Should my HBA show up as another device (/dev/sdc) before I start
attempting to multipath? Or is multipathd going to link both NIC and
HBA to the /dev/sdb device?
Thanks,
Scott
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