Disabling and enabling primary and alternative paths

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When you enter the parameter dpf_support in the IBMtape.conf file and install the IBMtape device driver, all the available paths for a physical device are enabled.

  1. Add the parameter of dpf_support and turn it off in the path entry in IBMtape.conf file. For example, 
    name="IBMtape" class="scsi" target=3 lun=0 dpf_support=0
  2. Stop the TMD (tape monitor daemon) from running on the system and unload the IBMtape driver module from the current kernel. 
    # /opt/IBMtape/tmd -s # /usr/sbin/rem_drv IBMtape
  3. Reload the IBMtape driver module in the kernel and start the daemon.
    # /usr/sbin/add_drv -m ’ 0666 bin bin’ IBMtape
# /opt/IBMtape/tmd
To enable a path from a disabled state, you can run the following steps.
  1. Add the parameter of dpf_support and turn it off in the path entry in IBMtape.conf file. For example,
    name="IBMtape" class="scsi" target=3 lun=0;
  2. Stop the TMD (tape monitor daemon) from running on the system and unload the IBMtape driver module from the current kernel.
    # /opt/IBMtape/tmd -s
# /usr/sbin/rem_drv IBMtape
  3. Reload the IBMtape driver module in the kernel and start the daemon.
    # /usr/sbin/add_drv -m ’ 0666 bin bin’ IBMtape
# /opt/IBMtape/tmd