Quantum Scalar i500 Betriebsanweisung PDF herunterladen (Seite 135)

100

101

Chapter 3 Configuring Your Library

Working With FC I/O Blades

Scalar i500 User’s Guide 116

Deleting an FC Host Connection 3

Administrators can delete connections to FC hosts without powering

down the system. Before deleting an FC host connection, make sure the

FC host is disconnected (offline) from the I/O blade.

A message will appear if the FC host is online when you attempt to delete

it. To continue, take the FC host offline or disconnect the FC host from the

I/O blade, wait for the FC host to go offline, and then continue to delete

the FC host connection.

The paths to open the appropriate screens are as follows:

• From the operator panel, select

Setup > I/O Blades > Host Management.

• From the Web client, select

Setup > I/O Blades > Host Management.

Host Mapping - Overview 3

Host mapping enables you to manually modify host information and set

logical unit number (LUN) mappings, and to map specific hosts to library

LUN devices.

I/O blades discover target devices that are attached to ports 3–6, as well

as their internal virtual port (see FC I/O Blade Internal Virtual Port for

Media Changers on page 111). Each of these devices has its own native

logical unit number (LUN) that is used to address the device via the port

to which it is attached. These LUNs can be re-mapped to new LUNs for

presentation via ports 1 and 2. Further, custom LUN maps can be

simultaneously defined for individual hosts.

For example, the FC I/O blade may discover tape drives attached to ports

3–6, each of which report themselves at LUN 0. The FC I/O blade could

be configured to re-map these to LUNs 1, 2, 3, and 4 for discovery on

ports 1 and 2. If desired, they could also be simultaneously mapped to

LUNs 3, 5, 7 and 9 for a specific host server.

There is also an internal (i.e., not attached to a port) controller device

presented at LUN 0 by default. The controller device facilitates

initialization and device discovery. In some instances it may be useful to

Note: If the host application is connected through an FC switch, a

power cycle of the I/O blade might be required to make the

host go offline. For instructions on how to power cycle an I/O

blade, see Controlling FC I/O Blade Power

on page 263.

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