Solaris Common Messages and Troubleshooting Guide

dumptm: Cannot open `/dev/rmt/string': Device busy


During file system backup, the dump program cannot open the tape drive, because some other process is holding it open.


Find the process that has the tape drive open, and either kill(1) the process or wait for it to finish.

# ps -ef | grep /dev/rmt
# kill -9 processID