GEOM SW RAID sensitive to power outage

[ZZzzzzz]

Hello,

I have a Dell 860 (II) server, with two commercial grade SATA disk, there is no HW RAID.

I've installed OPNsense 19.7 "Jazzy Jaguar", and i boundled the two disk with GEOM RAID 1.

Every time when power outage happens GEOM blocked the boot process with rebuilding one disk based on the other.

Short answare would be too simple: I should use UPS.

But!

before OPNsense I used Ubuntu server 16.04.xxs LTS on the same hardware (above) and within the same environment, and Ubuntu server never had RAID issue.

Is there any config param to hardening GEOM? Or should I skip avoid GEOM completly in this situation?

OPNsense without GEOM would be sensitive for power outage?

[banym]

Are you not using a RAID-controller at all or an HBA.

Some RAID-Controllers only simulate HBA mode or simulate one disk arrays. That can lead to the problem you see.