LUNs claimed but not in use by VxVM may report \"Device Busy\" when it is accessed outside VxVM (3667574)
When a LUN claimed by Veritas Volume Manager (VxVM) is accessed, the open on the device gets cached for performance improvement. Due to this, some OS utilities which require exclusive access reports
Device Busy.
Related information
Workaround:
To solve this issue, either exclude these LUNs from the VxVM view or disable them by typing
vxdmpadm disable dmpnodename=<> CLI.
For details, refer to the TechNote at: