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[Internal] VIO nova volume attach returns "The supplied device path (/dev/sxx) is in use" (2151562)

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Symptoms

Running the nova volume-attach command  (ie nova volume-attach <instance id> <volume id> /dev/sdd ) you recieve   ERROR (Conflict): The supplied device path (/dev/sdd) is in use. (HTTP 409) (Request-ID: req-<request-id>)

Cause

The device path given as part of volume attach command is ignored by VMware Nova driver because it is not supported by vSphere API

Resolution

VIO is working as designed. The problem is originating from a syntax issue when providing the command line string. Do not use device path as part of the command.

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