For non-zero exit codes, the first field is still the slot name, but the actual error messages are not fixed. An exit code of 1 implies that the operation failed in a benign way, for example an empty slot or an attempt to go backwards in a gravity stacker. The calling amanda program will print the error message if appropriate and continue, perhaps requesting the load of a different slot. Any other exit code is considered a fatal error and will cause amanda to stop attempting to talk to the tape changer. The new amtape program is the main operator interface to Amanda's tape changer support.
Effect is changer specific.
Effect is changer specific. Goes through the entire tape rack, showing the labels of all amanda tapes encountered. Amcheck also looks for the next tape in the rack the same way the taper does. If multiple tapes are used in one night, amcheck attempts to find all the needed tapes in turn if the tape-changer is random access. On a one-way gravity stacker, amcheck just finds the first tape, since finding the subsequent ones would put the first one out of reach of that night's amdump run.