ATTO Technology 1550D/E, 1500D/E operation manual Mapping devices, Single target mode, Node names

2.3 Mapping devices

SCSI devices are mapped using the designations for the SCSI bus, target and LUN. The iPBridge automatically maps all devices during startup. If you wish to change mapping you may use the CLI or the browser-based interface, ATTO ExpressNAV.

Note

To map devices, you should have a host computer connected to the iPBridge Ethernet port. Refer to Configuring the iPBridge on page 13.

By default, a host or initiator will view the iPBridge as a single iSCSI node with all available SCSI devices shown as LUNs on a single iSCSI target.

You may use multiple target mode to break the single iSCSI node into multiple nodes. Multiple target mode allows you to grant or deny access between initiators and devices as needed.

Node names

iSCSI nodes are accessed through the Ethernet ports on an iPBridge, each identified by its own IP address.

The iPBridge uses the iqn name format, referencing the device serial number, to guarantee that the target name is world-wide unique:

iqn.1995-12.com.attotech:ipbridge: serialnumber

CAUTION

Changing the device map can affect the host’s view of devices and your application configuration.

Single target mode

Single target mode is the default. Use the CLI commands or the ExpressNAV interface to map devices automatically or manually.

Note

The iPBridge automatically maps all devices on startup.

Use Command Line Interface

To map devices automatically with CLI 1 At the command prompt, type

AutoMap

All the CLI commands necessary to enable mapping and the command saveconfiguration norestart will be performed.

To map devices manually with CLI

1Type SCSITargets 0 to list the SCSI devices connected to the SCSI port.

The SCSITargets command lists each device and its corresponding SCSI address. In the example in Exhibit 2.3-2,the first tape drive is on SCSI Port 0 (on the IPBridge) at Target ID 4, LUN 0.

2The Route command manually maps SCSI devices through the bus/target/LUN.

•The command assigns an iSCSI LUN protocol address to a target destination device.

•More than one iSCSI LUN may not be assigned to a SCSI BTL. If you try to map a new SCSI BTL to the same iSCSI LUN, the new BTL will overwrite the original map.

Type

Route iSCSI <LUN> SCSI <sb> <st> <sl>

•st and sl are the SCSI target ID and SCSI LUN that the SCSI device is currently configured for.

3Type RouteDisplay iSCSI to display the current mapping and the current status of the device for iSCSI configurations.

RouteDisplay may be used at any time.

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ATTO Technology Inc. iPBridge Installation and Operation Manual