HP StorageWorks 300 HP StorageWorks 300 Virtual Library System user guide (AH1 - Page 89

LUN path failover, Storage LUNs window

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Figure 55 Storage LUNs window LUN path failover LUN path failover allows the VLS300 to automatically reroute data traffic usually assigned to one (preferred) path to another (secondary) path when the preferred path fails. Path status is shown in Command View VLS under Storage LUN Details. A failover is indicated in the Storage LUN Details screen by the yellow warning icon and the notification message: Fibre Channel Path Failed Over to {#:#:#:#}. The #s stand for the node port; bus number (always 0); the target id (an EVA port); and the LUN number on the EVA. When one path fails, automatic failover reroutes data traffic to the secondary path so the data transfer still happens, but potentially at a slower rate. It is advised that you restore the path as soon as possible to avoid a double path failure. To restore the failed path: 1. Determine the cause of the failure and repair it if needed. 2. In Command View VLS, access the System tab. 3. Select Storage LUNs from the navigation tree. 4. Select View to display the storage LUN details. 5. Select Fix Primary Paths from the task bar to display the Fix Primary Paths Wizard (Figure 56). HP StorageWorks 89

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Figure 55 Storage LUNs window
LUN path failover
LUN path failover allows the VLS300 to automatically reroute data traf
fi
c usually assigned to one
(preferred) path to another (secondary) path when the preferred path fails. Path status is shown in
Command View VLS under
Storage LUN Details
.
A failover is indicated in the
Storage LUN Details
screen by the yellow warning icon and the noti
fi
cation
message:
Fibre Channel Path Failed Over to {#:#:#:#}
. The #s stand for the node port; bus number
(always 0); the target id (an EVA port); and the LUN number on the EVA.
When one path fails, automatic failover reroutes data traf
fi
c to the secondary path so the data transfer
still happens, but potentially at a slower rate. It is advised that you restore the path as soon as possible to
avoid a double path failure.
To restore the failed path:
1.
Determine the cause of the failure and repair it if needed.
2.
In Command View VLS, access the System tab.
3.
Select
Storage LUNs
from the navigation tree.
4.
Select
View
to display the storage LUN details.
5.
Select
Fix Primary Paths
from the task bar to display the
Fix Primary Paths Wizard
(
Figure 56
).
HP StorageWorks
89