RAID supercapacitor only card (to replace BBU maintenance free) [closed]
Solution 1:
Adaptec does such a thing.
https://storage.microsemi.com/en-us/support/infocenter/release-2015-1/index.jsp?topic=/RAID_IUG.xml/Topics/Installing_a_RAID_Controller_with_ZMCP.html
P.S.
Supercapacitors aren’t maintenance free, they have lifetime of 10–15 years (typically), but hey I have Sun machines running since 2008.
https://passive-components.eu/wp-content/uploads/2017/10/3.3.-BUT-Kuparowitz-Supercap.pdf