The server has attempted to open a disk volume but has discovered that the volume is in use by another server.
The open operation fails for the volume.
To prevent concurrent RAW volume access by more than one server, files are created in the /tmp directory to 'lock' these volumes. The names of these temporary files are /tmp/adsm.disk.dev.<volumename> where <volumename> is the name of the RAW volume defined in the /dev directory. Please note that the name for the logical volume as defined in SMIT is represented in the /dev directory with a leading 'r' character (for example, a raw volume defined in SMIT as dsmstg1 will be represented in the /dev directory as the file /dev/rdsmstg1).
You may use the AIX® 'ps -e' command to determine if other dsmserv processes are running. You may remove the temporary lock files and attempt to re-start the server ONLY if there are no other dsmserv processes running