How to Configure Individual Multipathed FC Devices

This sample procedure uses fabric-connected host ports c0 and c2 to configure fabric devices as multipathed devices on a system that has the multipathing software enabled.

The cfgadm -c configure command for fabric devices is the same regardless of whether multipathing is enabled.

1. Become an administrator.
2. Identify the port WWN of the device to be configured as a multipathed device.

   Look for devices on a fabric-connected host port marked as fc-fabric. These devices are the devices you can configure with the cfgadm -c configure command.

   # cfgadm -al
   Ap_Id                 Type      Receptacle  Occupant     Condition
   c0                   fc-fabric  connected   unconfigured unknown
   c0::50020f2300006077 disk       connected   unconfigured unknown
   c0::50020f23000063a9 disk       connected   unconfigured unknown
   c1                   fc-private connected   configured   unknown
   c1::220203708b69c32b disk       connected   configured   unknown
   c1::220203708ba7d832 disk       connected   configured   unknown
   c1::220203708b8d45f2 disk       connected   configured   unknown
   c1::220203708b9b20b2 disk       connected   configured   unknown
   c2                   fc-fabric  connected   unconfigured unknown
   c2::50020f2300005f24 disk       connected   unconfigured unknown
   c2::50020f2300006107 disk       connected   unconfigured unknown

   In the above example, the c0::50020f2300006077 and c2::50020f2300006107 Ap_Ids represent the same storage device with different port WWNs for the storage device controllers. The c0 and c2 host ports are enabled for multipathing.

3. Configure the fabric device and make the devices available to the system.

   # cfgadm -c configure c0::50020f2300006077 c2::50020f2300006107

4. Verify that the selected devices are configured.

   # cfgadm -al
   Ap_Id                 Type      Receptacle  Occupant     Condition
   c0                  fc-fabric   connected   configured   unknown
   c0::50020f2300006077 disk       connected   configured   unknown
   c0::50020f23000063a9 disk       connected   unconfigured unknown
   c1                  fc-private  connected   configured   unknown
   c1::220203708b69c32b disk       connected   configured   unknown
   c1::220203708ba7d832 disk       connected   configured   unknown
   c1::220203708b8d45f2 disk       connected   configured   unknown
   c1::220203708b9b20b2 disk       connected   configured   unknown
   c2                   fc-fabric  connected   configured   unknown
   c2::50020f2300005f24 disk       connected   unconfigured unknown
   c2::50020f2300006107 disk       connected   configured   unknown

   Notice that the Occupant column of c0 and c0::50020f2300006077 specifies configured, which indicates that the c0 port has at least one configured occupant and that the c0::50020f2300006077 device is configured. The same change has been made in c2 and c2::50020f2300006107.

   When the configure operation has been completed without an error, multipathed devices are created on the system. If the physical device represented by c0::50020f2300006077 and c2::50020f2300006107 has multiple SCSI LUNs configured, each LUN is configured as a multipathed device. The example below shows that two LUNs are configured through c0::50020f2300006077 and c2::50020f2300006107. Each Ap_Id is associated with a path to multipathed devices.

   # cfgadm -al -o show_SCSI_LUN c0::50020f2300006077\ c2::50020f2300006107
   Ap_Id                  Type    Receptacle   Occupant     Condition
   c0::50020f2300006077,0 disk    connected    configured   unknown
   c0::50020f2300006077,1 disk    connected    configured   unknown
   c2::50020f2300006107,0 disk    connected    configured   unknown
   c2::50020f2300006107,1 disk    connected    configured   unknown

   The example above shows that the following two multipathed devices are created for the device represented by c0::50020f2300006077 and c2::50020f2300006107: