Addresses out-of-band management interfaces (e.g., storage controllers, web GUIs). Recommends:

ISO/IEC 27040 is an international standard that provides guidance on implementing controls and best practices for security of storage systems and storage security management. It is part of the ISO/IEC 27000 family, which covers information security management. The standard focuses specifically on the confidentiality, integrity, and availability of stored information across physical, virtual, and cloud storage environments.

Official PDFs from ISO or national bodies are fully text-searchable (not scanned images) and allow printing, usually with a watermark on each page.

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