ATTO Technology 1500D/E - Manual (Page 52)

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ATTO Technology Inc. iPBridge Installation and Operation Manual
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 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
1
Type 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.
2 The 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.
3 Type RouteDisplay iSCSI to display the current
mapping and the current status of the device for
iSCSI configurations.
RouteDisplay may be used at any time.