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

16 Controlling server access to volumes
Application servers (servers), also called clients or hosts, access storage volumes on the SAN using
the iSCSI protocol. You set up each server that needs to connect to volumes in a management
group in the CMC. We refer to this setup as a “server connection.” Server connections can be
single servers or server clusters. Use server clusters in the CMC to easily assign volumes to the
clustered application servers that are accessing the SAN storage volumes. For example, create
two servers and cluster them to assign two volumes to a Microsoft Exchange cluster or VMware
ESX Server simultaneously.
You can set up servers to connect to volumes in three ways. All three ways use the virtual IP (VIP)
for discovery and to log in to the volume from a server’s iSCSI initiator:
• iSCSI with VIP and load balancing—Use the load balancing option when you set up a server
connection in the CMC to balance connections to the SAN.
• Microsoft DSM or HP P4000 DSM for MPIO (if using)—Automatically establishes multiple
connections to the SAN.
• iSCSI with VIP only.
NOTE: Before setting up a server connection, make sure you are familiar with the iSCSI
information in “iSCSI and the HP P4000 SAN Solution” (page 230).
Setting up server connections to volumes requires the general tasks outlined below.
Table 56 Overview of configuring server access to volumes
For More InformationTask
If you are using the HP P4000 DSM for MPIO, ensure that
both the Microsoft MPIO and the DSM for MPIO are
Ensure that an iSCSI initiator is installed on the server.
installed on the server. Refer to the HP P4000 Application
Integration Solution Pack User Guide.
See “Adding server connections to management groups”
(page 198).
In the CMC, add the server connection to the management
group and configure iSCSI access for that server.
See “Creating a server cluster” (page 201).[Optional] Cluster multiple servers in the CMC to connect
multiple volumes to clustered application servers.
See
“Assigning server connections access to volumes”
(page 203)
In the CMC, assign volumes to the server or server cluster.
“Assigning server connections access to volumes”
(page 203).
See “Completing the iSCSI Initiator and disk setup”
(page 205).
In the iSCSI initiator on the server, log on to the volume.
See “Completing the iSCSI Initiator and disk setup”
(page 205).
On the server, configure the volume using disk management
tools.
Change in server access control from version 7.0 and earlier
Before release 8.0, you controlled server access to volumes using authentication groups and volume
lists. Starting with release 8.0, you control access with server and volume connections.
With release 8.0 and later, you add each server to a management group and assign server
connections to volumes or snapshots. You can make the assignment from either the volume or the
server.
The CMC displays the updated servers feature in management groups running SAN/iQ software
version 7.x and earlier. However, these servers show the IQN number as their name.
Change in server access control from version 7.0 and earlier 197