Raja Subramanian wrote:

Hi All,

My CentOS 5.1 server is using iSCSI attached disks connecting to a dual controller storage array. I have also configured multipathd to manage the multiple paths. Everything works well, and on boot the dev nodes are automatically created in /dev/mapper. On these devices, I have created logical volumes using lvm2.

My problem is that lvm does not recognize these iscsi/multipath volumes on boot up. I need to manually run "vgchange -ay" and mount the logical volumes by hand.

I tried running the vgchange and mount commands from /etc/rc.local, but that has no effect. I have verified that /etc/rc.local itself is executing correctly.

What do I need to put in my boot up scripts so logical volumes in iscsi/multipathd devices are automatically recognized on boot?

Check out: http://people.redhat.com/mchristi/iscsi/RHEL4/doc/readme

I think the key here is to add the _netdev option in fstab for those filesystems over iSCSI, even using LVM.

-Ross

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