RAID 10 (also known as RAID 1+0) is a combination of RAID 1 (mirroring) and RAID 0 (striping).
In a RAID 10 configuration, data is mirrored across multiple pairs of drives, and then those mirrored pairs are striped for performance. If two drives in one of the mirrored pairs fail, it can result in a fault condition for the RAID array, causing the fault lights to indicate the issue.
So, if the workstation is using RAID 10 and two drives in one of the mirrored pairs have failed, it would explain the solid fault lights on those drives.

A video production workstation that will consist of two high-end GPUs will require a lot of power and a modular power supply. A modular power supply allows the technician to connect only the cables that are needed for the components, which reduces clutter and improves airflow. A
1,200W power supply should be enough to power the two GPUs and other components, but the exact wattage depends on the specifications of the GPUs and other components. A 400W external power supply is not enough to power the workstation and may not be compatible with the ATX case. Two 600W redundant power supplies are unnecessary and may not fit in the ATX case. A 1,500W uninterruptible power supply (UPS) is a device that provides backup power in case of a power outage, but it is not a replacement for a power supply unit (PSU).

You will need at least four disks to create a RAID 10 configuration and there must be an even number of disks. Note that it carries the same 50% disk overhead that mirroring does.