Mpxio overview, Preparing the host system – HP EVA Array iSCSI Connectivity Option User Manual

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IMPORTANT:

Multi-initiators can access the same LUN in single path as well. Accessing the same LUN is not restricted

to multipathing.

Configuring multipath with the Solaris 10 iSCSI Initiator

This section contains information about configuring multipath with the Solaris 10 iSCSI Initiator.

MPxIO overview

The Sun multipathing software (MPxIO) provides basic failover and load-balancing capability to HP

StorageWorks EVA4x00/6x00/8x00 storage systems. MPxIO allows the merging of multiple SCSI layer

paths, such as an iSCSI device exposing the same LUN via two different iSCSI target names. Because

MPxIO is independent of transport, it can multipath a target that is visible on both iSCSI and FC ports.

This section describes only the iSCSI implementation of MPxIO with the mpx100/100b.

NOTE:

MPxIO is not supported on versions of the EVA3000/5000.

For more information about MPxIO, see the Solaris Fibre Channel and Storage Multipathing

Administration Guide at:

Preparing the host system

To verify that MPxIO is enabled:

Issue the following command to verify that the MPIO setting is no:

/kernel/drv/iscsi.conf file to verify mpxio-disable=”no”

If setting is yes change to no, and reboot:

Reboot -- -r

Example (enabling and disabling MPxIO on all iSCSI ports): /kernel/dev/iscsi.conf settings

# Use is subject to license terms.

#ident "@(#)iscsi.conf 1.2 06/06/12 SMI"

name="iscsi" parent="/" instance=0;

ddi-forceattach=1;

# I/O multipathing feature (MPxIO) can be enabled or disabled using

# mpxio-disable property. Setting mpxio-disable="no" will activate

# I/O multipathing; setting mpxio-disable="yes" disables the feature.

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Setting up the iSCSI Initiator for multipathing