ldev.conf appears to specify a primary and single failover node (http://doc.lustre.org/lustre_manual.xhtml#dbdoclet.zfssnapshotConfig).

However, It's not necessarily the case that resources are limited to a primary and failover pair; there may be more placements than two.

For example, Exascaler HA is configured such that an OST could be mounted on any of  four available VMs.

It seems that we should expand the ldev.conf such that multiple failovers could be listed after the primary.