HiCommand Dynamic Link Manager User's Guide (for Windows(R))

2.2.2 System configuration using an IP-SAN

In an IP-SAN, LAN cables are used to connect hosts and storage subsystems. The cable port on the host is an iSCSI host bus adapter (iSCSI HBA) or a network interface card (NIC). When using an NIC, the iSCSI software must be installed in advance on the host. The cable port on the storage subsystem is a port (P) on a channel adapter used for iSCSI connections (CHA).

A logical unit (LU) contained in a storage subsystem is the target of input to, or output from, the host. An area in an LU is called a Dev.

A route that connects a host and a Dev in an LU is called a path.

HDLM assigns an ID to the management-target path. This ID is called a path management PATH_ID. Also, the path might be called a management target.

Figure 2-2 IP-SAN system configuration using an iSCSI HBA shows the IP-SAN system configuration using an iSCSI HBA. Figure 2-3 IP-SAN system configuration using the iSCSI software and NIC shows the IP-SAN system configuration using the iSCSI software and an NIC.

Figure 2-2 IP-SAN system configuration using an iSCSI HBA

Figure 2-3 IP-SAN system configuration using the iSCSI software and NIC

Table 2-2 HDLM system components that use the IP-SAN lists the HDLM system components that use the IP-SAN.

Table 2-2 HDLM system components that use the IP-SAN

Components Description

iSCSI software The driver software that has the iSCSI initiator function.

iSCSI HBA A host bus adapter that has the iSCSI initiator function.
This serves as a cable port on the host. The iSCSI HBA is referred to as the HBA in HDLM commands and HDLM GUI. It is sometimes called an HBA in this manual.

NIC A network interface card that serves as a cable port on a host. The NIC is referred to as the HBA in HDLM commands and HDLM GUI. It is sometimes called an HBA in this manual.

IP-SAN A data transfer network that connects hosts and storage subsystems by using the iSCSI standard.

CHA A channel adapter used for iSCSI connections.

P A port on a channel adapter. This serves as a cable port on a storage subsystem.

LU A logical unit with which the host can perform input or output operations. This unit can be accessed from the network.

Dev A logical area (a partition) in an LU.

Path A route that connects a host and a Dev in an LU.

Organization of this subsection

(1) Setting range of the iSCSI software and iSCSI HBA

(2) Storage subsystems supported by HDLM

Components	Description
iSCSI software	The driver software that has the iSCSI initiator function.
iSCSI HBA	A host bus adapter that has the iSCSI initiator function. This serves as a cable port on the host. The iSCSI HBA is referred to as the HBA in HDLM commands and HDLM GUI. It is sometimes called an HBA in this manual.
NIC	A network interface card that serves as a cable port on a host. The NIC is referred to as the HBA in HDLM commands and HDLM GUI. It is sometimes called an HBA in this manual.
IP-SAN	A data transfer network that connects hosts and storage subsystems by using the iSCSI standard.
CHA	A channel adapter used for iSCSI connections.
P	A port on a channel adapter. This serves as a cable port on a storage subsystem.
LU	A logical unit with which the host can perform input or output operations. This unit can be accessed from the network.
Dev	A logical area (a partition) in an LU.
Path	A route that connects a host and a Dev in an LU.

(1) Setting range of the iSCSI software and iSCSI HBA

The following describes the range of settings for the iSCSI software and iSCSI HBA. For notes on setting the values, see the Hardware Notes supplied with HDLM.

IP addresses
Set the same network address for an HBA and a CHA port connected via a path.

Other settings

You can share the IP-SAN with other hosts.

A single HBA can connect to multiple CHA ports.

When using the iSCSI software and multiple NICs, connect to the storage subsystem by each NIC using a separate different IP network and different CHA ports for each NIC with the storage subsystem. To view a configuration example, see Figure 2-3 IP-SAN system configuration using the iSCSI software and NIC.

(2) Storage subsystems supported by HDLM

Storage subsystems applicable to the IP-SAN are the Lightning 9900V Series, TagmaStore AMS/WMS Series, Hitachi TagmaStore Universal Storage Platform 100, Hitachi TagmaStore Universal Storage Platform 600, Hitachi TagmaStore Universal Storage Platform 1100, and TagmaStore NSC 55.

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