HP EVA P6000, User Manual

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MPxIO overview
The Oracle multipathing software (MPxIO) provides basic failover and load-balancing capability
to HP P6000, and EVA4x00/6x00/8x00 storage systems. MPxIO allows the merging of multiple
SCSI layer paths, such as an iSCSI device exposing the same LUN via several 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 iSCSI
or iSCSI/FCoE modules.
For more information about MPxIO, see the Solaris Fibre Channel and Storage Multipathing
Administration Guide at:
http://docs.sun.com/source/819-0139 .
Preparing the host system
To verify that MPxIO is enabled:
1.
Enter the following command to verify that the MPIO setting is
no
:
cat kernel/drv/iscsi.conf
2. 2. Verify
mpxio-disable=”no”
If setting is
yes
change to
no
, and reboot:
Reboot -- -r
Example: MPxIO on all iSCSI port settings in
/kernel/dev/iscsi.conf
.
# Copyright 2006 Sun Microsystems, Inc. All rights reserved.
# 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.
#
# Global mpxio-disable property:
#
# To globally enable MPxIO on all iscsi ports set:
# mpxio-disable="no";#
# To globally disable MPxIO on all iscsi ports set:
# mpxio-disable="yes";
#
mpxio-disable="no";
#
Enabling MPxIO for HP P6300/P6500 EVA
This section describes the steps necessary to configure a Solaris server to recognize an HP storage
array in an iSCSI multipath environment with the iSCSI or iSCSI/FCoE modules.
Edit the
scsi_vhci.conf
file
HP EVA storage arrays are supported with MPxIO:
•
As symmetric devices only
•
With no load balancing
•
With no failback
To configure MPxIO for HP storage devices, the appropriate information needs to be added in the
/kernel/drv/scsi_vhci.conf
file. To enable MPxIO for HP storage:
1. Use a text editor to change the configuration file. For example:
# vi /kernel/drv/scsi_vhci.conf
106 iSCSI or iSCSI/FCoE configuration rules and guidelines