Installation manual

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3.3 FC LUN Masking Utility
ATTO storage controller drivers allow you to select which devices and Logical Unit Numbers (LUNs) on a SAN
are visible to Windows operating systems.
Many devices, including RAID controllers and SCSI-
to-Fibre Channel bridges, use LUNs to allow access to
multiple drive units through a single World Wide Name
(WWN). However, you may not want to allow all users
connected to one device to have access to all devices.
The ATTO LUN masking utility allows you, as the
administrator, to select which LUNs each user may
access, allowing greater flexibility in configuring a
Fibre Channel SAN.
The utility gives information, allows you to add a new
device to an adapter or allows LUN masking using
three windows:
Main Window monitors and manages all LUN
masking functions. The page is divided into two sub-
sections:
Adapters and Devices .
• Adapter List displays information about all the
adapters detected or configured on this system.
The first column displays the WWN of the
adapter. If the adapter is installed, the second
column displays the model of the adapter.
Clicking on an adapter in the adapter list
updates the device list.
• Device List displays information about all
devices detected or configured for the adapter
selected in the adapter list.
The first column displays the device’s WWN.
The second column displays whether the first
column refers to a Node WWN, Port WWN, Any
WWN or is Disabled. The third column displays
the current LUN mask configuration.
Adding a new device to an adapter
1 Select the adapter in the Main Window adapter
list.
2 Click on the Add Device button at the bottom of
the page.
3 Enter the WWN of the device or select a WWN
from the drop down box.
4 Select the type of WWN to use:
• Disabled
• Node
• Port
• Any
5 Click OK.
6 The device name displays in that adapter’s
Device List on the bottom half of the main
window. Click the Save Changes button on the
bottom of the windows.
Using the Edit LUN Mask Dialog box
1 Double click the WWN of the device you wish to
edit in the Devices List or select it and click the
Edit LUN Mask button. If you do not see the
device listed, you may need to add it.
2Select Mask all LUNs or Mask LUN List to
enter the specific LUNs you wish to mask.
3 When you have completed configuring the LUN
mask for this device, click the OK button.