You can use the mpathadm command to display multipathing support information and also manage multipathing discovery. Multipathing support and property information is identified with the Multipath Management API plug-in library name, which is displayed by using the mpathadm command.
# mpathadm list mpath-support mpath-support: libmpscsi_vhci.so
# mpathadm show mpath-support libmpscsi_vhci.so mpath-support: libmpscsi_vhci.so Vendor: Sun Microsystems Driver Name: scsi_vhci Default Load Balance: round-robin Supported Load Balance Types: round-robin logical-block Allows To Activate Target Port Group Access: yes Allows Path Override: no Supported Auto Failback Config: yes Auto Failback: on Failback Polling Rate (current/max): 0/0 Supported Auto Probing Config: 0 Auto Probing: NA Probing Polling Rate (current/max): NA/NA Supported Devices: Vendor: SUN Product: T300 Revision: Supported Load Balance Types: round-robin Vendor: SUN Product: T4 Revision: Supported Load Balance Types: round-robin . . .
The command output also shows a list of device products that is supported by the multipathing support software. The multipathing support libmpscsi_vhci.so library file supports T10 target port group compliant devices by default.
The following steps describe how to display the properties of an initiator port.
# mpathadm list initiator-port Initiator Port: iqn.1986-03.com.sun:01:ffffffffffff.4e94f9bd,4000002a00ff Initiator Port: 210100e08ba41feb Initiator Port: 210000e08b841feb
# mpathadm show initiator-port 2000000173018713 Initiator Port: 210100e08ba41feb Transport Type: Fibre Channel OS Device File: /devices/pci@1,0/pci1022,7450@1/pci1077,141@2,1/fp@0,0
If you do not specify the initiator port with the mpathadm show initiator-port command, the properties of all the discovered initiator ports are displayed.
Display the list of LUs, along with the properties for each LUN by using the mpathadm command. The displayed list of LUs contain names that in turn can be used to display the properties of a particular LU.
# mpathadm list lu /dev/rdsk/c0t600144F08069703400004E828EE10004d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600144F08069703400004E8183DF0002d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800026D63A0000A4974E23424Ed0s2 Total Path Count: 4 Operational Path Count: 4 . . .
# mpathadm show lu /dev/rdsk/c4t60003BA27D2120004204AC2B000DAB00d0s2 mpath-support: libmpscsi_vhci.so Vendor: SUN Product: Sun Storage NAS Revision: 1.0 Name Type: unknown type Name: 600144f08069703400004e828ee10004 Asymmetric: yes Current Load Balance: round-robin Logical Unit Group ID: NA Auto Failback: on Auto Probing: NA Paths: Initiator Port Name: 210100e08ba41feb Target Port Name: 2100001b329b6c3f Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210100e08ba41feb Target Port Name: 2101001b32bb6c3f Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210100e08ba41feb Target Port Name: 2100001b329b793c Override Path: NA Path State: OK Disabled: no . . . Target Port Groups: ID: 0 Explicit Failover: no Access State: active optimized Target Ports: Name: 2100001b329b6c3f Relative ID: 1 Name: 2101001b32bb6c3f Relative ID: 2 ID: 1 Explicit Failover: no Access State: standby Target Ports: Name: 2100001b329b793c Relative ID: 257 Name: 2101001b32bb793c Relative ID: 256
If you do not specify the LU name with the mpathadm show lu command, the information about all the discovered logical units are displayed.
Use the steps below to display paths through a target port.
# mpathadm list lu /dev/rdsk/c0t600144F08069703400004E828EE10004d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600144F08069703400004E8183DF0002d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 Total Path Count: 4 Operational Path Count: 4 . . .
# mpathadm show lu /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 Logical Unit: /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 mpath-support: libmpscsi_vhci.so Vendor: SUN Product: CSM200_R Revision: 0660 Name Type: unknown type Name: 600a0b800029065c00007cf54e234013 Asymmetric: yes Current Load Balance: round-robin Logical Unit Group ID: NA Auto Failback: on Auto Probing: NA Paths: Initiator Port Name: 210000e08b841feb Target Port Name: 200800a0b826d63b Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210000e08b841feb Target Port Name: 200900a0b826d63b Override Path: NA Path State: OK Disabled: no . . . Target Port Groups: ID: 4 Explicit Failover: yes Access State: standby Target Ports: Name: 200800a0b826d63b Relative ID: 0 Name: 200800a0b826d63c Relative ID: 0 ID: 14 Explicit Failover: yes Access State: active Target Ports: Name: 200900a0b826d63b Relative ID: 0 Name: 200900a0b826d63c Relative ID: 0
# mpathadm list lu -t 20030003ba27d212 mpath-support: libmpscsi_vhci.so /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Total Path Count: 4 Operational Path Count: 4 mpath-support: libmpscsi_vhci.so /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 Total Path Count: 4 Operational Path Count: 4 mpath-support: libmpscsi_vhci.so /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2 Total Path Count: 4 Operational Path Count: 4 mpath-support: libmpscsi_vhci.so /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2 Total Path Count: 4 Operational Path Count: 4 . . .
Display detailed information on multipathed LUs, including path and target port group information. Note that the name property in the information represents the identifier for this LU, derived from the hardware, and used by this system. If the name is derived from SCSI Inquiry Vital Product Data (VPD) page 83h, the name type property represents an associated identifier type defined by the SCSI standards.
# mpathadm list lu /dev/rdsk/c0t600144F08069703400004E828EE10004d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600144F08069703400004E8183DF0002d0s2 Total Path Count: 8 Operational Path Count: 8 /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800029065C00007CF54E234013d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800026D63A0000A4984E234298d0s2 Total Path Count: 4 Operational Path Count: 4 /dev/rdsk/c0t600A0B800029065C00007CF44E233FCFd0s2 Total Path Count: 4 Operational Path Count: 4 . . .
# mpathadm show lu /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Logical Unit: /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 mpath-support: libmpscsi_vhci.so Vendor: SUN Product: CSM200_R Revision: 0660 Name Type: unknown type Name: 600a0b800026d63a0000a4994e2342d4 Asymmetric: yes Current Load Balance: round-robin Logical Unit Group ID: NA Auto Failback: on Auto Probing: NA Paths: Initiator Port Name: 210000e08b841feb Target Port Name: 200800a0b826d63b Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210000e08b841feb Target Port Name: 200900a0b826d63b Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210000e08b841feb Target Port Name: 200800a0b826d63c Override Path: NA Path State: OK Disabled: no Initiator Port Name: 210000e08b841feb Target Port Name: 200900a0b826d63c Override Path: NA Path State: OK Disabled: no Target Port Groups: ID: 3 Explicit Failover: yes Access State: active Target Ports: Name: 200800a0b826d63b Relative ID: 0 Name: 200800a0b826d63c Relative ID: 0 ID: 13 Explicit Failover: yes Access State: standby Target Ports: Name: 200900a0b826d63b Relative ID: 0 Name: 200900a0b826d63c Relative ID: 0
You can specify the –e or –-path-missing option with the mpathadm show lu command to display the logical units only for missing paths.
# mpathadm list lu -n 600a0b800026d63a0000a4994e2342d4 mpath-support: libmpscsi_vhci.so /dev/rdsk/c0t600A0B800026D63A0000A4994E2342D4d0s2 Total Path Count: 4 Operational Path Count: 4