Assigned LUN is not recognized by the host

A LUN assigned to a host using IBM Spectrum Control is not recognized by the host, and IBM Spectrum Control does not report the error.

Problem

This problem can occur if the host connection for the selected host was incorrectly configured on the storage subsystem, and the host is unable to log in to the storage subsystem. Some examples of configuration settings that, if incorrectly configured, can cause this problem are the storage subsystem I/O port configuration (FICON/FcSf) or the OS selection.

Action

Remove all LUNs from the storage subsystem for the selected host and delete the host connection. Recreate the host connection with the correct configuration settings, and once again assign the LUNs to the host.