BugId 4657088

Problem Summary: Dissociating/detaching a plex from a VxVM disk group under Sun Cluster 3.0 might panic the cluster node with the following panic string.

  panic[cpu2]/thread=30002901460: BAD TRAP: type=31 rp=2a101b1d200 addr=40  
  mmu_fsr=0 occurred in module "vxfs" due to a NULL pointer dereference

Workaround: Before you dissociate/detach a plex, unmount the corresponding file system.