IBM TS2340 User Guide - Page 421
Disable and Enable Primary and Alternate Paths Control Path, Failover
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Solaris - Tape Utility Program (tapeutil) Serial Number 000001301084 Ucode Level 227B Path World Wide NN .......... N/A Path World Wide PN .......... N/A Path Type Alt_path_1 Path Enable Device Physical Path ........ /devices/pci@4,2000/pci@1/fibre-channel@4/IBMtape@3,1 Instance Number 293 SCSI Target 2 SCSI LUN 1 Serial Number 000001301084 Ucode Level 227B Path World Wide NN .......... N/A Path World Wide PN .......... N/A Path Type Alt_path_2 Path Enable Device Physical Path ........ /devices/pci@6,4000/lpfc@4/IBMtape@2,1 This option shows specific information for each path, such as the instance number for the logical device, device serial number, the target id, the logical unit number, the current enabled status, path type and so on. It also indicates how many paths are configured for the device, and which path is active currently. Disable and Enable Primary and Alternate Paths (Control Path Failover) Once you install the IBMtape device driver, by default, all the available paths for a physical device are enabled. If for some maintenance reason you need to disable a path and do not want to fail over to this path, you can run the following steps: 1. Turn the failover parameter to off in the path entry in the IBMtape.conf file. For example, name="IBMtape" class="scsi" target=3 lun=1 failover=0; 2. Stop the TMD (tape monitor daemon) 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. Remove the parameter of failover=0 in the path entry in IBMtape.conf file. For example, name="IBMtape" class="scsi" target=3 lun=1" 2. Stop the TMD (tape monitor daemon) 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 Appendix D. Tape Utility Programs 403