Unraid (1P) vs SHR-1 — 4×8 TB

You have 4 drives of 8 TB (32 TB raw) and are deciding between Unraid (1P) (independent disks + 1 parity drive) and SHR-1 (Synology Hybrid RAID, single redundancy, mixed sizes OK). The table shows what each choice actually gives you.

Both give the same usable capacity on this configuration — the decision is about failure behavior, not space.

With drives of 8 TB and larger, single-parity rebuilds carry measurable URE risk — check yours in the rebuild calculator.

Open this exact configuration in the calculator and tweak drives, sizes and levels freely.