For further details, refer to the following documentation:

• Data ONTAP Command Reference Guide

• Data ONTAP System Administrator's Guide

Tips for robotic devices

• To display the robot device file, sign on to the IBM Nxxxx host and enter the following command:

  sysconfig -m

  The device names in the output are in the format mcN, where N is 0 or higher.

  Example sysconfig output:

  Medium changer (6a.4) HP C6280-7000
  mc0 - medium changer device

Tips for tape drives

• To display tape device files, sign on to the IBM Nxxxx host and enter the following command:

  sysconfig -t

  Always use the drive names that begin with nr (such as nrst0a) because these are the non-rewinding devices.

  Example sysconfig output:

  Tape drive (6a.5)  Quantum DLT7000
     rst0l  - rewind device,	       format is: 81633 bpi 40 GB (w/comp)
     nrst0l - no rewind device,	    format is: 81633 bpi 40 GB (w/comp)
     urst0l - unload/reload device, format is: 81633 bpi 40 GB (w/comp)
     rst0m  - rewind device,        format is: 85937 bpi 35 GB
     nrst0m - no rewind device,     format is: 85937 bpi 35 GB
     urst0m - unload/reload device, format is: 85937 bpi 35 GB
      rst0h - rewind device,        format is: 85937 bpi 50 GB (w/comp)
     nrst0h - no rewind device,     format is: 85937 bpi 50 GB (w/comp)
     urst0h - unload/reload device, format is: 85937 bpi 50 GB (w/comp)
      rst0a - rewind device,        format is: 85937 bpi 70 GB (w/comp)
     nrst0a - no rewind device,     format is: 85937 bpi 70 GB (w/comp)
     urst0a - unload/reload device, format is: 85937 bpi 70 GB (w/comp)

• The NDMP service is controlled by the Data ONTAP administrative interface or the following commands:

  ndmpd on(Starts the NDMP service.)

  ndmpd off(Stops the NDMP service.)

  ndmpd status(Displays the status of the NDMP service including any active NDMP sessions.)

  ndmpd probe session-number(Displays details about the specified session.)

• By default, the NDMP service is not started at boot time. To start it, add the following line to the end of the /etc/rc file on the IBM system:

  ndmpd on

• To determine the number of objects in a volume, enter the following command:

  maxfiles

Known restrictions

• The user name used with the tpconfig command must be defined as root for each data mover.

• If you eject a tape from an IBM Nxxxx-attached drive and then try to open the device, it will reload the tape. This happens when the device is still UP and the NetBackup automatic-volume-recognition daemon (avrd) polls it.