Unidentified Devices

An unidentified node or device occurs when MDSM cannot access a new storage array. Causes for this error include network connection problems, the storage array is turned off, or the storage array does not exist.

NOTE: Before beginning any recovery procedure, make sure that the host context agent software is installed and running. If you started the host before the host was connected to the storage array, the host context agent software is not be able to find the storage array. If so, make sure that the connections are tight, and restart the host context agent software.

•If a storage array is managed by using both out-of-band management and in-band management using the same host, a management network connection problem might prevent direct communication with the storage array. However, you might still be able to manage the storage array over the in-band connections. The opposite situation can also occur.

•If a storage array is managed through more than one host, it is possible that the storage array might become unresponsive to communication over the connections given by one host. However, you might still be able to manage the storage array over the connections provided by another host.

Recovering From an Unidentified Storage Array

To recover from an unidentified storage array:

1Make sure that the network connection to the storage management station is operating.

2Make sure that the controllers are installed and that the power is turned on to the storage array. Correct any existing problems before continuing.

3If you have an in-band storage array, use the following procedure. Click Refresh after each step to check the results:

a Make sure that the host context agent software is installed and running. If you started the host before the host was connected to the controllers in the storage array, the host context agent software is not be able to find the controllers. If so, make sure that the connections are tight, and restart the host context agent software.

b Make sure that the network can access the host by using the ping command in the following syntax:

244

Troubleshooting: Your Storage Array Software

Page 243 Page 245
Page 244
Image 244
Dell MD3220i, MD3200i owner manual Unidentified Devices, Recovering From an Unidentified Storage Array, 244
Page 243 Page 245

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.
Top Page Image Contents