labstore1006 and 1007 failover with a symlink, primarily when things go badly. However, currently bad mounts are not firmly removed, requiring manual intervention, etc.
This has been brought to our attention by T196651, where disk faults caused read-only remounts on both systems.
First, documenting clush commands and actions to take will handle most cases.
Then, look into any way to automate the process, if possible.