Solaris SAN Configuration and Multipathing Guide

To Enable a Path

If the path to a logical unit is disabled, the enable command changes the path back to enabled. The full path must be specified using the initiator port name, target port name, and the logical unit. To verify the change, run the show command for the logical unit.

Run the mpathadm list lu command.

# mpathadm list lu
    /dev/rdsk/c4t60020F20000035AF4267CCCB0002CEE2d0s2
        Total Path Count: 2
        Operational Path Count: 2
    /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2
        Total Path Count: 2
        Operational Path Count: 2
    /dev/rdsk/c4t60003BA27D2120004204AC1A000F1D6Cd0s2
        Total Path Count: 2
        Operational Path Count: 2

Select a logical unit name from the output.

Run the mpathadm show lu logical-unit-name command.

# mpathadm show lu /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2
logical unit: /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2
    mpath-support libmpscsi_vhci.so
     Vendor:  SUN
     Product:  T4
     Revision:  0301
     Name Type:  SCSI Inquiry VPD page 83 type 3
    Name:  60003ba27d2120004204ac2b000dab00
     Asymmetric:  yes
     Current Load Balance:  round-robin
     Logical Unit Group ID:  NA
     Auto Failback:  on
     Auto Probing:  NA

     Paths:
          Initiator Port Name:  2000000173818713
          Target Port Name:  20030003ba27d212
          Override Path:  NA
          Path State:  OK
          Disabled:  no

         Initiator Port Name:  2000000173018713
          Target Port Name:  20030003ba27d095
          Override path:  NA
          Path State:  OK
          Disabled:  no

     Target Port Groups:
          ID:  2
          Explicit Failover:  yes
          Access State:  standby
          Target Ports:
               Name:  20030003ba27d212
               Relative ID:  0
    
          ID:  5
          Explicit Failover:  yes
          Access State:  active
          Target Ports:
               Name:  20030003ba27d095
          Relative ID:  0

Select an initiator port and a target port name.

Run the mpathadm enable path -i initiator-port-name -t target-port-name -l logical-unit-name command.

# mpathadm enable path -i 2000000173018713 -t 20030003ba27d095 \
        -l /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2