Using DM Multipathing Devices

NOTE: Using or modifying any nodes other than the multipathing device nodes can result in array or file system problems, including loss of communication with the array and corruption of the file system. Avoid accessing any device other than the multipathing device.

NOTE: After creating a partition on a multipathing device, all I/O operations, including file system creation, raw I/O and file system I/O, must be done through the partition node and not through the multipathing device nodes.

Prerequisite Steps

The following tasks must be completed before proceeding. For more information about steps 1-3, see the MD3200i and MD3220i storage arrays Deployment Guide. For more information about step 4, see "Creating Virtual Disks" on page 106.

1Install the host software from the MD3200i Series resource media— Insert the Resource media in the system to start the installation of Modular Disk Storage Manager (MDSM) and Modular Disk Configuration Utility (MDCU).

NOTE: Red Hat install of 5.x requires a remount of the DVD media to make contents executable.

2Reboot when prompted by the install program—The installation program prompts for and needs a reboot at completion of the installation.

3Configure using MDCU—After the host server has rebooted, the MDCU automatically starts and is present on the desktop. This utility allows for quick and easy configuration of new and or existing MD3200i Series storage arrays present on your network. It also provides a GUI wizard for establishing the iSCSI sessions to the array.

4Create and map virtual disks using MDSM—After configuring the arrays using the Modular Disk Configuration Utility, run the Modular Disk Storage Manager to create and map virtual disks.

Using the MDSM software:

1Map the host server to the MD3200i Series storage array

2Create the Virtual Disks

3Map newly created arrays to your host server

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Configuration: Device Mapper Multipath for Linux

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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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