Modifying and Removing Host-to-Virtual Disk Mapping

You can modify or remove a host-to-virtual disk mapping for several reasons, such as an incorrect mapping or reconfiguration of the storage array. Modifying or removing a host-to-virtual disk mapping applies to both hosts and host groups.

To modify or remove host to virtual disk mapping:

NOTE: Before you modify or remove a host-to-virtual disk mapping, you must stop any data access (I/O) to the virtual disks to prevent data loss.

1In the AMW, select the Mappings tab.

2In the Defined Mappings pane, perform one of these actions:

•Select a single virtual disk, and select Mappings→ Change→ Mapping.

•Right-click the virtual disk, and select Change Mapping from the pop-up menu.

3In Host group or host, select the appropriate host group or host.

By default, the drop-down list shows the current host group or the host associated with the selected virtual disk.

4In Logical unit number, select the appropriate LUN.

The drop down list shows only the currently available LUNs that are associated with the selected virtual disk.

5Click OK.

Stop any host applications associated with this virtual disk, and unmount the virtual disk, if applicable, from your operating system.

6In the Change Mapping dialog, click Yes to confirm the changes.

The mapping is checked for validity and is saved. The Defined Mappings pane is updated to reflect the new mapping. The Topology pane is also updated to reflect any movement of host groups or hosts.

NOTE: If a password is set on the storage array, the Enter Password dialog appears. Type the current password for the storage array, and click OK.

7If configuring a Linux host, run the rescan_dm_devs utility on the host, and remount the virtual disk if required. This utility is installed on the host as part of the MDSM install process.

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Configuration: Disk Groups and Virtual Disks

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MD3200i, MD3220i specifications

The Dell MD3220i and MD3200i are part of Dell's extensive line of modular storage solutions, designed to support organizations in optimizing their data management and scalability requirements. These models offer reliable performance and flexible features, making them suitable for various workloads including virtualization, cloud storage, and disaster recovery.

One of the standout features of the MD3220i and MD3200i is their support for iSCSI storage networking. By utilizing the Internet Small Computer Systems Interface (iSCSI) protocol, these systems provide organizations with a cost-effective way to connect their storage over existing network infrastructure, enabling efficient data transfers and management.

Both models are equipped with dual controllers that ensure high availability and failover capabilities, which are crucial for meeting uptime requirements in mission-critical environments. The dual controllers also facilitate load balancing and increase overall system performance, as they allow multiple paths to the storage, enhancing I/O performance.

Scalability is another key characteristic of the MD3220i and MD3200i. These storage arrays can be expanded to meet growing storage demands, supporting up to 240TB of raw capacity with up to 16 additional expansion enclosures. This flexibility allows organizations to start with a smaller configuration and grow their storage capabilities without a complete overhaul of the existing infrastructure.

The units also support multiple disk types, including traditional spinning disks, solid-state drives (SSDs), and a combination of both. This versatility enables users to tailor storage configurations to their specific performance and budgetary needs. Furthermore, the systems feature advanced data management technologies such as snapshots and remote replication, providing essential tools for data protection.

With their ease of management, the MD3220i and MD3200i are designed for straightforward configuration and operation. The intuitive management interfaces allow IT professionals to monitor performance, configure storage, and manage data effectively, ensuring businesses can maintain optimal system availability.

In summary, the Dell MD3220i and MD3200i are robust, scalable, and versatile storage solutions that cater to diverse organizational needs. Their integrated technologies, such as iSCSI support, dual controller architecture, and advanced data management features, make them an ideal choice for modern data centers looking to enhance storage capabilities while ensuring reliability and performance.
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