HP Hitachi Dynamic Link Manager Software - Manual (Page 35)

2. HDLM Functions
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2.2.2 System Configuration Using an IP-SAN
In an IP-SAN, LAN cables are used to connect hosts to storage systems. The cable port
on the host is called an iSCSI host bus adapter (iSCSI HBA) or a network interface
card (NIC). In order to use an NIC, the iSCSI software must be installed ahead of time
on the host. The cable port on the storage system is called a port (P) on a channel
adapter (CHA) used for iSCSI connections.
A logical unit (LU), which lies in a storage system, is either an input target or an output
target to or from a host. The areas within an LU are called Devs.
A route that connects a host to a Dev in an LU is called a path.
HDLM assigns a unique ID to each management-target path. This ID is called
AutoPATH_ID. Sometimes, the path is also just simply called a management target.
Figure 2-2: Configuration of an IP-SAN System When Using an iSCSI HBA shows
the configuration of an IP-SAN system when using an iSCSI HBA.
Figure 2-3: Configuration of an IP-SAN System When Using iSCSI Software and an
NIC shows the configuration of an IP-SAN system when using the iSCSI software and
an NIC.
Figure 2-2: Configuration of an IP-SAN System When Using an iSCSI HBA