Disabling multipathing on a Solaris host

This section describes how to disable multipathing on a Solaris host.

By default, multipathing is always enabled.

To disable multipathing on a Solaris host, use the following steps:

  1. Open the /kernel/drv/iscsi.conf file.
  2. Set the mpxio-disable parameter to no.
    mpxio-disable=”no”
  3. Reboot the system.
    reboot --- -r

    The -r option is the boot argument for reconfiguration boot. The system searches all attached hardware devices and configures the logical namespace in /dev.

  4. Use the format command to find the device. If you have two paths for the same LUN, you see output like the following example:
    c5t3d0 <IBM-2145-0000 cyl 5118 alt 2 hd 32 sec 64>
    /iscsi/disk@0000iqn.1986-03.com.ibm%3A2145.nilgir.dvt1105980001,0
    c5t4d0 <IBM-2145-0000 cyl 5118 alt 2 hd 32 sec 64>
    /iscsi/disk@0000iqn.1986-03.com.ibm%3A2145.nilgir.dvt1109120001,0

    The output shows that the targets are different for both paths, but they refer to the same LUN.

    Note: The SCSI Inquiry command is available under the format command. For iSCSI support, you cannot enable nor disable multipathing on a per device basis.
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