HP StorageWorks XP Remote Web Console Software - Manual (Page 13)

LUN Configuration and Security Manager XP user guide for the XP1024/XP128 13
1 LUN Manager for the XP1024/XP128
You can connect XP arrays to open system and mainframe hosts using iSCSI (Internet Small Computer
System Interface) and Fibre Channel. Use LUN Manager to configure host groups, logical units (LUs), and
Fibre Channel ports.
LU configuration overview
One of the important tasks in logical unit (LU) configuration is to define I/O paths from hosts to LUs. After
the paths are defined, the hosts can send commands and data to the LUs and can receive data from them.
LUN Manager can also configure security policies to protect LUs from unauthorized access.
Fibre Channel environment
In a Fibre Channel environment, you must configure the Fibre Channel ports on the disk array. With LUN
Manager, you can set addresses and speed, and specify topology for Fibre Channel ports.
iSCSI environment
In an iSCSI environment, the XP disk array provides mutual user authentication between hosts and ports
by using Challenge Handshake Authentication Protocol (CHAP).
Supported emulation types
LUN Manager supports the following device emulation types:
• OPEN-3, OPEN-9, OPEN-8 (XP1024/XP128 only), OPEN-E, OPEN-L, and OPEN-V for open systems
• 3390-3A/B/C and 3380-KA/B/C for mainframe systems
LU paths
After hosts and the disk array are physically connected by cables, switches, and so on, use LUN Manager
to establish paths between the hosts and LUs. These paths are called LU paths and they determine which
host can access which LU.
• Up to 256 LU paths can be defined for a host group in a Fibre Channel or iSCSI environment
• Up to 512 LU paths can be defined for a Fibre Channel port for the XP1024/XP128 arrays
• Up to 128 host groups can be defined for a Fibre Channel port for the XP1024/XP128 arrays
• In an iSCSI environment, you can define:
• Up to 16 initiators per port
• Up to 16 host groups per port
• Up to 16 initiators per host group
NOTE: In an iSCSI environment, the number of initiators per host group multiplied by the number
of host groups must be less than or equal to 16.
• Up to 65,536 host groups can be defined for one disk array (256 x 256)
• Up to 255 hosts can be included in all the host groups for one Fibre Channel port
• Up to 16 hosts can be included in all the host groups for one iSCSI port
Configuring LU paths in a Fibre Channel environment
Before defining LU paths, you must classify server hosts by host storage domains. For example, if Linux
and Windows hosts are connected to the disk array, you must create a separate host storage domain for
each host type. When this is done, register the host bus adapters for each host type in the appropriate
host storage domain.