Solaris SAN Configuration and Multipathing Guide

Port Configuration Considerations

Before you start configuring the software by port, consider the following:

ProcedureTo Configure Multipathing by Port

Depending on how many ports you want the multipathing software to control, you can enable or disable multipathing globally or for specified ports.

  1. Log in as root (su - root).

  2. Determine the HBA controller ports that you want the multipathing software to control.

    For example, to select the desired device, perform an ls -l command on /dev/cfg directory. The following example shows the ls -l command output.

    lrwxrwxrwx  1 root  root  50 Jan 29 21:33 c0 -> 
    lrwxrwxrwx  1 root  root  61 Jan 29 21:33 c1 ->
    lrwxrwxrwx  1 root  root  61 Jan 29 21:33 c2 -> 
    lrwxrwxrwx  1 root  root  53 Jan 29 21:33 c3 -> 
    lrwxrwxrwx  1 root  root  54 Apr 16 20:28 c5 ->
    lrwxrwxrwx  1 root  root  56 Apr 16 20:28 c6 -> 

    Note –

    Controllers c5 and c6 are ports A and B on a dual-port FC HBA. Controllers c1 and c3 are single port SAS HBA ports. Controller c2 is the internal SAS controller in a Sun FireTM T2000 server.

    Once you have determined the port, or ports, you want to explicitly enable or disable multipathing for, go to the next step.

  3. Enable or disable specific ports as follows:

    • FC HBA ports

      1. Edit file /kernel/drv/fp.conf

      2. Add the following line for each FC HBA port that is to be enabled:

        name="fp" parent="parent name" port=port-number mpxio-disable="no";

        where parent name is the port device name, and port-number is the FC HBA port number.

        For example, the following entries disable multipathing on all FC HBA controller ports except for the two specified ports:

        name="fp" parent="/pci@6,2000/SUNW,qlc@2" port=0 mpxio-disable="no";
        name="fp" parent="/pci@13,2000/pci@2/SUNW,qlc@5" port=0 mpxio-disable="no";
      3. Add the following line for each FC HBA port that is to be disabled:

        name="fp" parent="parent name" port=port-number mpxio-disable="yes";

        For example:

        name="fp" parent="/pci@6,2000/SUNW,qlc@2" port=0 mpxio-disable="yes";
  4. Type stmsboot -u to start the reboot and configuration process.

    You are prompted to reboot. During the reboot, the /etc/vfstab file and your dump device configuration are updated to reflect any device name changes.

  5. (Optional) After the reboot, if necessary, configure your applications to use new device names as described in Multipathing Considerations.