Hi list!
I have a server with dual port Qlogic iSCSI HBA. I set up the same LUN for both ports, and boot the CentOS installer with "linux mpath".
Installer detects multipathing fine, and creates mpath0 device for root disk. Installation goes fine, and the system boots up and works fine after the install from the multipath root device.
After install the setup is like this:
LUN 0 on port 1: /dev/sda LUN 0 on port 2: /dev/sdb
and those form mpath0 device, which works OK.
But then comes the problem.. when I add another LUN for both ports, the setup is like this:
LUN 0 on port 1: /dev/sda LUN 1 in port 1: /dev/sdb
LUN 0 on port 2: /dev/sdc LUN 1 on port 2: /dev/sdd
And now after rebooting the system, root device multipath (mpath0) doesn't work anymore.. initrd seems to use/mount /dev/sda* partitions instead of mpath0 device. In fact the whole mpath0 is not started up.
The weird thing is that the other LUN is now using multipathing instead.. using mpath1 device.
How can I fix that? I'd like to use multipathing for both LUNs, also for root device.
If I regenerate initrd with verbose flag, it just sets up the mpath1, not mpath0. I guess that's because mpath0 is not running when regenerating initrd.
I have edited /etc/multipath.conf and disabled the "blacklist" line, and added multipath-entries for both LUNs. So those should be fine..
Any ideas?
Thanks!
-- Pasi