9.5.01 HP P4000 SAN Solution User Guide (AX696-96168, February 2012)

Figure 113 (page 234) illustrates the configuration for a single host authentication with 2-way CHAP
required.
Figure 113 Adding an initiator secret for 2-way CHAP (shown in the MS iSCSI initiator)
CAUTION: Without the use of shared storage access (host clustering or clustered file system)
technology, allowing more than one iSCSI application server to connect to a volume concurrently
without cluster-aware applications and/or file systems in read/write mode could result in data
corruption.
NOTE: If you enable CHAP on a server, it will apply to all volumes for that server.
Best practice
In the Microsoft iSCSI Initiator, target and initiator secrets are not displayed. Keep a separate
record of the iSCSI Initiator CHAP information and the corresponding server information.
About HP DSM for MPIO
If you are using the HP DSM for MPIO, you can use HP DSM for MPIO to access volumes. For
more information about HP DSM for MPIO, refer to the HP P4000 DSM for MPIO Deployment
Guide.
You can see if you are using HP DSM for MPIO in the CMC by selecting a server in a management
group, then clicking the Volumes and Snapshots tab. The Gateway Connection column shows
multiple connections labeled as DSM.
When accessing volumes from a server using HP DSM for MPIO, keep in mind the following:
• HP DSM for MPIO and the Microsoft MPIO must be installed on the server.
• With these installed, servers automatically use HP DSM for MPIO when you log on to volumes
from the iSCSI initiator.
• If you have dual storage NICs in your server, you can select the Enable multi-path option when
logging on to the volume, and log on from each NIC.
234 iSCSI and the HP P4000 SAN Solution