Controller B of a storage device works properly, but controller A is inaccessible to either the ISM or the CLI. By checking the current status of the storage device in the ISM, a faulty coffer disk can be found and its icon becomes (SATA disk in this case).
Product and version information:
S2600 (with dual controllers)
S5000 series (with dual controllers)
Replace the faulty coffer disk without compromising the services.
One of the controllers cannot be accessed properly due to a faulty coffer disk.