Best Drives for UnRAID 2026 — Parity and Array Picks

The best drives for UnRAID in 2026 are CMR drives sized around your parity strategy. UnRAID allows mixed capacities in the array, but the parity drive must be at least as large as your biggest data drive — so buy your largest drive first and assign it to parity.

Use CMR for parity without exception (SMR parity rebuilds take days), add an NVMe or SSD cache pool for fast writes, and lean on refurbished enterprise drives for the array since a single failure never loses the whole pool. Match parity capacity to your largest planned data drive so you can grow later.

On the recording question, Western Digital's own 2020 blog post recommended its CMR-based Red drives, naming Red Pro and Red Plus, specifically in the context of ZFS resilvering, and stated that sustained random writes during a resilver leave device-managed shingled drives no idle time to reorganise. The WD Red page decodes which model numbers are which and lists every shingled model currently in stock, and the exact-model resolver answers for any part number you paste, OEM suffixes included.

Once the array is built, the usual next bottleneck is the network: two cards and one cable gives a workstation a direct 10GbE path to it with no switch.

The other half of the hardware question is the storage controller. Both of these manage redundancy themselves, so they need to see each physical disk and its SMART data - which a RAID card presenting virtual disks cannot give them. Our IT mode guide covers what that means, what TrueNAS's own documentation says about it, and which cards ship ready versus needing a firmware change. For a complete machine, our build guide prices the whole parts list live.