How to Disable Multipathing

Perform the following steps to disable multipathing on all multipath-capable devices on SPARC or x86 based systems. If you want to disable multipathing only on specific FC or SAS HBA ports, refer to Enabling or Disabling Multipathing on a Per-Port Basis.

1. Disable device multipathing.

   # stmsboot -d
   WARNING: stmsboot operates on each supported multipath-capable controller
            	detected in a host. In your system, these controllers are
   
   	/devices/pci@780/pci@0/pci@8/SUNW,qlc@0/fp@0,0
   	/devices/pci@780/pci@0/pci@8/SUNW,qlc@0,1/fp@0,0
   	/devices/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@1
   	/devices/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@1
   	/devices/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2
   	/devices/pci@7c0/pci@0/pci@9/LSILogic,sas@0
   	/devices/pci@7c0/pci@0/pci@9/LSILogic,sas@0
   
   	If you do NOT wish to operate on these controllers, please quit stmsboot
   	and re-invoke with -D { fp | mpt } to specify which controllers you wish
   	to modify your multipathing configuration for.
   
   	Do you wish to continue? [y/n] (default: y) y
   	Checking mpxio status for driver fp
   	Checking mpxio status for driver mpt
   	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

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   Note - During the reboot, /etc/vfstab and the dump configuration are updated to reflect the device name changes.

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2. (Optional)After the reboot, if necessary, configure your applications to use new device names as described by Device Name Change Considerations in Multipathing Considerations.