[Lustre-discuss] how to define 60 failnodes

[lelustre]

    I have 60 nodes to use as OSS ，I have made an experiment : I use a disk（iscsi） to be an OST ， if I do not define the failnodes when I use the mkfs.luster command, I mount this ost and at the client node ,lfs df -h can see this OST, but when I umount it and mount the ost to another OSS ，
lfs df -h can not see it again. But if I define the failnodes in the mkfs.luster command, and do the operations above, we can see the OST at the client node using lfs df -h command. 
    So my question is :if I want an OST to failover to any OSS (one of sixty nodes),should I need to defined 60 failnodes when I format the disk?or can I use pacemaker to select an oss and modify something to notify client that the disk is on some OSS？
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