IF YOU HAVE DETERMINED THAT A DISK VOLUME IS INACCESSIBLE TO OPENVMS FOR READ AND/OR WRITE,use the DCL command SHOW DEVICE /FULL to check that the correct volume is properly mounted. If the volume cannot be written, examine the physical device to see whether write lock switches or plugs have been disturbed.

IF YOU HAVE DETERMINED THAT A DISK VOLUME IS INACCESSIBLE TO UNIX FOR READ AND/OR WRITE, use the df command to check that the correct volume is properly mounted. If the volume cannot be written, examine the physical device to see whether write lock switches or plugs have been disturbed.

IF YOU CANNOT LOCATE THE PROBLEM, run disk diagnostics. Be aware that many disk diagnostics are destructive (i.e., destroy your files). Avoid these diagnostics until you have exhausted all other avenues. If you have to run destructive disk diagnostics, or you determine that a disk spindle must be replaced, start planning for the recovery immediately.