Hello Harv1010, The error code A mean the following:  “Tape drive hardware problem. The tape drive determined that a problem occurred that degraded the operation of the tape drive, but it did not restrict continued use. If the problem persists, contact Dell technical support. The drive is usable, though the single-character display continues to indicate an error and the fault LED flashes amber.” What you need to do is to hold in the eject button for 30 seconds & it will cycle the drive.  If the error comes back on the tape drive then will need to run some diagnostics on the drive to see what the issue is that is causing the error. Please let us know if you have any other questions.
One of the 2 tape drives in my powervault 114X displays error code A.  What does this mean? The drive still works and is visible as online in Backup Exec 2010.
Powervault 114X LTO4 tape drive error code A