[CentOS] lvm with iscsi devices on boot

Ross S. W. Walker RWalker at medallion.com
Thu Jun 19 19:34:06 UTC 2008

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.


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