Data · June 2026
Spinning rust, ranked by the datasheet — manufacturer specs + PCPartPicker, synthesized in UltraDB

The 2026 Hard Drives breakdown.

Current 3.5" desktop, NAS and enterprise hard drives compared by what their datasheets actually claim — capacity, sustained transfer rate, reliability spec (workload rate, MTBF, warranty) and CMR-vs-SMR recording tech — then ranked by $/TB. This is bulk spinning-rust storage, NOT an SSD: for speed you buy flash; for cheap terabytes you buy these. Every number traces to a WD/Seagate/Toshiba datasheet or a live PCPartPicker price.

Start with the job — it drives every chart below

Price vs capability

Each bubble is a drive; further right = more capable (capacity + sustained performance + reliability spec + $/TB + recording tech); color = brand. Re-scores when you pick a job — a NAS RAID weights reliability + CMR; bulk desktop weights $/TB.

What works with what

Drives linked to the features that matter for the job — CMR vs SMR recording, helium-sealing, 7200 RPM, 512MB cache, OptiNAND, RV sensors, and the enterprise-grade 5-year / 550TB-per-year reliability spec.

Compatibility — hard drives ↔ drive technologies

All hard drives

Method & honesty

Capability index — the formula (audit it)

Capability is the average of the five scored axes (capacity, performance, reliability, $/TB value, recording tech); value = capability² ÷ price.

No single drive wins every axis — the enterprise Exos/Gold lead capacity + reliability but cost the most per drive; the desktop BarraCuda/Blue are cheap per-TB but are SMR or unrated for RAID. The Tech axis enforces the one rule that bites people: CMR beats SMR, especially inside a NAS.

Honesty. Accuracy is priority #1. Capacity, transfer rate, cache, RPM, workload rate, MTBF and warranty are all MANUFACTURER-CLAIMED from each drive's datasheet (not independent lab benchmarks — real random-IO varies by workload and isn't comparable across brands, so the Performance axis is a relative claimed-spec proxy, not a measured benchmark). The reliability composite uses published workload/MTBF/warranty, not field-failure (AFR) data, which manufacturers don't publish per-drive. PRICES are mid-2026 US street prices and the 2026 HDD market is in a severe spike — high-capacity drives that historically sold near $280-350 are currently $580-980, so $/TB is inflated and volatile; drives with no clean current price carry value_perf:null and don't score the value axis. Nothing is fabricated; unknowns stay blank.