HP XP P9500 Hitachi Dynamic Link Manager Software User Guide for VMWare (HIT52 - Page 20
Devices Managed by HDLM, System Configuration, HDLM Functions
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Devices Managed by HDLM Below is a list of devices that can or cannot be managed by HDLM. The devices that can be managed by HDLM are called HDLM management-target devices. HDLM management-target devices: The following devices are from the storage systems listed in Section What is HDLM? on page 1-2: ¢ SCSI devices ¢ Hitachi storage system command devices, such as Hitachi RAID Manager command devices Non-HDLM management-target devices: ¢ SCSI devices other than those that are in the storage systems listed in Section What is HDLM? on page 1-2 ¢ Built-in disks on a host ¢ Non-disk devices (tape devices, etc.) 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 called a host bus adapter (HBA). The cable port on the storage system is called a port (P) on a channel adapter (CHA). 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 2-1 HDLM System Configuration on page 2-3 shows the HDLM system configuration. 2-2 HDLM Functions Hitachi Dynamic Link Manager User Guide (for VMware(R))