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Dell EMC PowerVault MD 34XX/38XX Series Storage Arrays Administrator's Guide

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Unidentified devices

An unidentified node or device occurs when the MD Storage Manager 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 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 may prevent direct communication with the storage array. However, you may 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 may become unresponsive to communication over the connections given by one host. However, you may still be able to manage the storage array over the connections provided by another host.
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