The Mechanism
RAID 0 configurations rely heavily on a controller to dictate how data blocks are distributed. This controller can be hardware-based (a dedicated PCIe RAID card) or software-based (managed by the motherboard BIOS/UEFI or the operating system). Failure occurs when:
- The hardware RAID card experiences an electrical surge or firmware corruption.
- The motherboard BIOS updates or resets, losing its specific RAID configuration mapping.
- Operating system metadata files managing a software RAID become corrupted during an improper shutdown.
The Impact on RAID 0
When a controller fails, it loses the array metadata—the structural map detailing the drive order, stripe block size (e.g., 64KB or 128KB), and sequence. Even if all physical hard drives are completely healthy, the system will view them as unformatted, independent disks.
