HP StorageWorks XP Remote Web Console Software - Manual (Page 19)

For more information, see:
• Defining LU paths
• Changing or viewing LU path settings
• Defining and viewing alternate paths
NOTE:
•
In Fibre Channel environments, you can define up to 1,024 LU paths for one host group and up
to 1,024 LU paths for one port.
• You cannot define LU paths to LUN On-Demand volumes.
• You cannot define LU paths to volumes reserved by Auto LUN XP.
• You can create up to 255 host groups for one Fibre Channel port.
• You cannot define LU paths to journal volumes.
• You cannot define LU paths to pool volumes.
Configuring LU paths in iSCSI environments
After open-system hosts and the array are physically connected by cables, hubs, and so on, you must
use XP LUN Configuration and Security Manager Software to establish I/O paths between the hosts
and logical volumes. This defines which host can access which logical volume. Logical volumes that
open-system hosts can access are referred to as logical units (LUs). Paths between open-system hosts
and LUs are referred to as LU paths.
Before defining LU paths, you must classify server hosts by iSCSI targets. For example, if Linux and
Windows hosts are connected to the array, you must create one iSCSI target for Linux hosts and
another iSCSI target for Windows hosts. Then you must register the host bus adapters for Linux hosts
in the Linux iSCSI target. You must also register the host bus adapters for Windows hosts in the
Windows iSCSI target.
iSCSI targets can contain only hosts connected to the same port, and cannot contain hosts connected
to different ports. For example, if two Windows hosts are connected to port 1A and three Windows
hosts are connected to port 1B, you cannot register all five Windows hosts in one iSCSI target. You
must register the first two Windows hosts in one iSCSI target and register the remaining three Windows
hosts in another iSCSI target.
After classifying server hosts into iSCSI targets, you must associate the iSCSI targets to logical volumes.
In
Figure 3 , the hg-lnx iSCSI target is associated with three logical volumes (00:00, 00:01, and
00:02). LU paths are defined between the two hosts in the hg-lnx iSCSI target and the three logical
volumes.
XP LUN Configuration and Security Manager User Guide 19