Dell POWERVAULT MD3600I - Manual (Page 60)

NOTE: For more information on configuring hosts, see About Your Host .
If a component such as a RAID controller module or a cable fails, or an error occurs on the data path to the preferred
RAID controller module, virtual disk ownership is moved to the alternate non preferred RAID controller module for
processing. This failure or error is called failover.
Drivers for multi-path frameworks such as Microsoft Multi-Path IO (MPIO) and Linux Device Mapper (DM) are installed
on host systems that access the storage array and provide I/O path failover.
For more information on Linux DM, see
Device Mapper Multipath for Linux . For more information on MPIO, see
microsoft.com.
NOTE: You must have the multi-path driver installed on the hosts at all times, even in a configuration where there is
only one path to the storage system, such as a single port cluster configuration.
During a failover, the virtual disk transfer is logged as a critical event, and an alert notification is sent automatically if
you have configured alert destinations for the storage array.
Managing Host Port Identifiers
You can do the following to manage the host port identifiers that are added to the storage array:
• Add — Add or associate a new host port identifier to a particular host.
• Edit — Change the host port identifier alias or user label. You can move (associate) the host port identifier to a
new host.
• Replace — Replace a particular host port identifier with another host port identifier.
• Remove — Remove the association between a particular host port identifier and the associated host.
To manage a host port identifier:
1. In the AMW, select the Host Mappings tab.
2. Perform one of these actions:
– Right-click the host in the object tree, and select Manage Host Port Identifiers in the pop-up menu.
– From the menu bar, select Host Mappings → Manage Host Port Identifiers.
The Manage Host Port Identifiers dialog is displayed.
3. To manage the host port identifiers in the Show host port identifiers associated with list:
– For a specific host, select the host from the list of hosts that are associated with the storage array.
– For all hosts, select All hosts from the list of hosts that are associated with the storage array.
4. If you are adding a new host port identifier, go to step 5. If you are managing an existing host port identifier, go to
step 10.
5. Click Add.
The Add Host Port Identifier dialog is displayed.
6. Select the appropriate host interface type.
7. Select the method to add a host port identifier to the host. You can select:
– Add by selecting a known unassociated host port identifier — Select the appropriate host port identifier
from the existing list of Known unassociated host port identifiers.
– Add by creating a new host port identifier — In New host port identifier, enter the name of the new host
port identifier.
8. In Alias, enter an alphanumeric name of up to 30 characters.
9. In Associated with host, select the appropriate host.
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