OS Native Multipathing Software

Installing and Enabling Multipathing Software

In Solaris 10, the multipathing software has been installed by default, but is not enabled.

After ALUA is enabled on the storage system, run the stmsboot -D fp -e command to enable the multipathing software. You do not need to configure the software on the host.

The following is an example:

bash-3.2# stmsboot -D fp -e 

WARNING: This operation will require a reboot. 

Do you want to continue ? [y/n] (default: y) y 

The changes will come into effect after rebooting the system. 

Reboot the system now ? [y/n] (default: y) y 

updating /platform/sun4u/boot_archive

The host restarts after the preceding operation is performed.

After the host restarts, the following LUN information is displayed.

Figure 6-13 LUN information in Solaris

The path format is scsi_vhci, indicating that this path an aggregation of multiple paths.

Verification

After the LUNs are mapped to the host, scan for the LUNs on the host and verify that the numbers and status of the preferred and non-preferred paths are correct. The following is an example:

root@solarisx86:~# mpathadm show lu /dev/dsk/c0t6222222100222222000E25A800000004d0s2 

Logical Unit:  /dev/rdsk/c0t6222222100222222000E25A800000004d0s2 

        mpath-support:  libmpscsi_vhci.so 

        Vendor:  HUAWEI 

        Product:  XSG1             

        Revision:  4303 

        Name Type:  unknown type 

        Name:  6222222100222222000e25a800000004 

        Asymmetric:  yes 

        Current Load Balance:  round-robin 

        Logical Unit Group ID:  NA 

        Auto Failback:  on 

        Auto Probing:  NA 

        Paths: 

                Initiator Port Name:  2100001b3210fbda 

                Target Port Name:  200800ac01020304 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2100001b3210fbda 

                Target Port Name:  2602222222222222 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2100001b3210fbda 

                Target Port Name:  2619222222222222 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2100001b3210fbda 

                Target Port Name:  202800ac01020304 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2101001b3230fbda 

                Target Port Name:  201800ac01020304 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2101001b3230fbda 

                Target Port Name:  2601222222222222 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2101001b3230fbda 

                Target Port Name:  2618222222222222 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

                Initiator Port Name:  2101001b3230fbda 

                Target Port Name:  203800ac01020304 

                Override Path:  NA 

                Path State:  OK 

                Disabled:  no 

        Target Port Groups: 

                ID:  33 

                Explicit Failover:  no 

 Access State:  active optimized

                Target Ports: 

                        Name:  200800ac01020304 

                        Relative ID:  8193 

                ID:  1 

                Explicit Failover:  no 

Access State:  active optimized

                Target Ports: 

                        Name:  2602222222222222 

                        Relative ID:  23 

                        Name:  2601222222222222 

                        Relative ID:  22 

                ID:  2 

                Explicit Failover:  no 

 Access State:  active not optimized

                Target Ports: 

                        Name:  2619222222222222 

                        Relative ID:  282 

                        Name:  2618222222222222 

                        Relative ID:  281 

                ID:  35 

                Explicit Failover:  no 

  Access State:  active not optimized

                Target Ports: 

                        Name:  202800ac01020304 

                        Relative ID:  8705 

                ID:  34 

                Explicit Failover:  no 

 Access State:  active not optimized

                Target Ports: 

                        Name:  201800ac01020304 

                        Relative ID:  8449 

                ID:  36 

                Explicit Failover:  no 

 Access State:  active not optimized

                Target Ports: 

                        Name:  203800ac01020304 

                        Relative ID:  8961 

root@solarisx86:~#

In the command output:

• If Access State is active optimized, the path is a preferred one.
• If Access State is active not optimized, the path is a non-preferred one.

In this example, there are three preferred paths and five non-preferred paths. The result is the same as configured, indicating that the configuration is successful.