User`s guide

7 – Setting Up Connections
Configuring LUNs for a Device
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NOTE:
■ You can set only the LUN path of an enabled LUN. A LUN path can be
set as preferred or alternate if the device path is configured as hidden or
visible, but not as unconfigured.
■ You can use the Current Path option from the Host menu to view the
failover settings for a selected host and set preferred or alternate LUN
path as the currently active path (see section 7.5).
7.3.2.1
Auto Configuring All LUN Paths on this Device
The auto configure option configures all LUN paths for the selected device to their
default values. The default path for each LUN is the first available path as preferred,
with the other paths as alternates for LUN failover.
From the LUN Configuration dialog box Tools menu, select Auto Configure to
configure the LUN paths on this device to their default values.
7.3.2.2
Load Balancing LUN Paths on this Device
The load balance option configures all LUN paths on this device as preferred or
alternate using the all available paths evenly. The LUNs are staggered between the
adapters to distribute the loads. You can configure all LUNs or only LUNs that are
enabled.
Perform the following steps to configure all or enabled LUNs on this device:
1. From the LUN Configuration dialog box Tools menu, select Load Balance.
2. Do one of the following:
❑ Select Enabled LUNs Only to configure only enabled LUNs for load
balancing across the paths within this device.
If you selected this option for a device with no enabled LUNs, the no LUNs
enabled message displays. Click OK.
❑ Select All LUNs to configure all LUNs for load balancing across the paths
within this device.
7.3.2.3
Configuring LUN Paths to the Default Values
You can configure LUN paths to their default values for LUN failover, with the first
configured path as preferred and all other paths as alternate. You can configure the
following:
■ All LUNs for an adapter (see section 7.3.2.3.1)
■ An individual LUN (see section 7.3.2.3.2)