1 HV Installation and Operations Guide

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Controller LUN Commands

The HP Surestore Bridge FC 2/1LV and FC 4/1 HV models support a set of

SCSI-3 commands that can be received as FCP commands over the Fibre

Channel bus or as SCSI commands over a SCSI bus. These commands are

hereafter referred to as Controller LUN commands. These commands provide

support for a number of value added features including:

■ Copy Manager

■ In-Band Management.

When using Controller LUN commands to access Copy Manager and In-Band

Management, the commands must be sent to the controller LUN(s) of the

bridge.

Controller LUNs are addressable in all addressing modes. In SCC mode, there

is just one controller LUN. In Auto-Assigned and Indexed modes, there can be

up to a total of four configurable controller LUNs on the FC 2/1 LV and FC 4/

1 HV bridges. These controller LUNs allow the host software to run multiple

concurrent Extended Copy Commands — each controller LUN being capable

of supporting one Extended Copy operation.

It is also possible to initiate Extended Copy operations by sending commands

to any tape device LUN on the bridge. As a result, there can be numerous

concurrent copy commands active at one time.

When the bridge is configured in the Indexed or Auto-Assigned modes there is

also a controller LUN at LUN 0x7f. This specific LUN offers an additional way

to address the controller LUN at a known fixed address. This controller LUN

only gets reported to the Host when the bridge is in Indexed mode.

Note Auto Assigned Mode — Controller LUNs are numbered in

sequence following the last device LUN. There is no gap between

device LUNs and controller LUNs.