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You should always favor mdadm (software raid) over fake RAID solutions. Sometimes it's better to use this even over real RAID cards (which are proprietary) beca
by herpderperator 8y ago
You should always favor mdadm (software raid) over fake RAID solutions. Sometimes it's better to use this even over real RAID cards (which are proprietary) because you don't have to find an exact clone of the card if it fails; mdadm is all software. The only time it would be appropriate to use a real RAID card is when the performance gain is an absolutely necessary requirement, or if you need to expose a logical device to the BIOS or OS that maps to the RAID array without additional setup.
- bashinator 8y agoI once had a particularly bad time where the 3ware RAID card had a bad interaction with the controller on our hard drives, preventing a rebuild after a disk failure. Thank goodness I had marked that system as best-effort, no-guarantees when asked for cheap local mass storage. This wasn’t even fake motherboard RAID - but it was a screwdriver DIY box. Mdadm is far more resilient, and I would never go with hardware RAID again without full vendor support.