https://www.theregister.co.uk/2018/01/08/spectre_and_meltdown_fixes_could_slow_storage/

Analysis How will the bugfixes for Intel's Spectre and Meltdown vulnerabilities affect storage?

IBM – which plans to release firmware updates tomorrow that address Spectre-like bugs in its designs for its POWER CPUs – has said that its storage won't be affected at all. We received an IBM statement which confirmed: "IBM Storage appliances are not impacted by this vulnerability."