I notice the newest version of the ClearCase plug-in automatically mounts all the VOBs. This is the safest way to make sure the VOB is mounted when looking for changes but it could lead to errors specially in *nix land. If all the VOBs are mounted, lets say half of the VOBs are located on server A and the other half are located on server B, and one of the VOB servers, server B, goes down it will cause every server that mounted the VOBs located on server B in NFS land to not respond (stale NFS handle) because it was mounted on either the master/slave node. If the project only loads 2 VOBs, the SCM polling shouldn't mount every VOB (50 VOBs) but only the 2 required VOBs. In most cases, the ClearCase administrator has a startup script to mount all the VOBs or a specific set of VOBs. I think the cleartool mount -all should be optional or the plug-in should mount the VOBs that are in the load rules only.