Ah, after running the diagnostics tool the error went away immediately, and got a message stating "Notice [TOWER] - Cache 2 returned to normal operation WD_Red_SN700_1000GB_24473G800380 (nvme1n1)" "Notice [TOWER] - Cache 2 returned to normal operation WD_Red_SN700_1000GB_24473G800532 (nvme0n1)" So we can mark this as resolved, how ever if anybody notices anything unusual on the diagnostics that could help understand what could have happened to prevent this in the future, would be really appreciated. Also I tried stopping and running the array twice after this just to be sure the error was not going to be inmediately repeated.