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2 system configuration – HP Hitachi Dynamic Link Manager Software User Manual

Page 29

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2. HDLM Functions

7

2.2 System Configuration

HDLM manages routes between a host and a storage system by using the SCSI driver.

The host and storage systems are connected using SAN with fiber cables. The cable

port on the host is a host bus adapter (HBA). The cable port on the storage system is

a port (P) on a channel adapter (CHA).
A logical unit (LU) contained in a storage system 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 manages a path by assigning an ID to it. This ID is called the AutoPATH_ID.
A path may also be called a management target. The ID that AIX assigns to a path is

called the OS management path ID. The OS management path ID can be displayed by

executing the AIX

lspath

command. Also, HDLM can display the OS management

path ID that corresponds to the path management

PATH_ID

when you execute the

HDLM command's

view

operation with the

-lu

or

-drv

parameter specified. For

details about the

view

operation, see 6.7 view (Displays Information).

Figure 2-1: HDLM System Configuration shows the HDLM system configuration.