Some more considerations while you are disabling or enabling multipathing are as follows:
Device names in the /dev and /devices trees change. Applications that use device names directly must be configured to use the new names when you change multipath configuration from enable to disable or vice versa.
Entries to /etc/vfstab entries and dump configuration change. The /etc/vfstab file and the dump configuration of the system contain references to device names. The stmsboot command automatically updates the /etc/vfstab file dump configuration with the new device names.
You can use the stmsboot command to enable or disable multipathing for FC and SAS devices. The stmsboot command updates the /etc/vfstab file and dump configuration to reflect device name changes during the next reboot. The following considerations apply to the stmsboot command:
You must reboot immediately after you run the stmsboot command.
Because the stmsboot command reboots the machine to complete the configuration, use the eeprom to ensure the system boots from the current boot device.
The stmsboot command saves a copy of /kernel/drv/fp.conf, /kernel/drv/mpt.conf, and /etc/vfstab files before modifying the files. If you encounter unexpected problems while using the stmsboot command, see Troubleshooting Multipathing Problems.