Hardware Spec Index

Novexa HD-1821 XT 20TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Novexa · SKU HD1821-XT · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index2,610 (Hard Drives scale)
Category rank#8,410
Street price$399
Power8 W
Performance per dollar6.54
Released2021

Specifications

BrandNovexa
ModelNovexa HD-1821 XT
Capacity20 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer280 MB/s
Workload rating300 TB/year
MTBF1.2 million hours
Helium-filledYes
Warranty3 years

Related guides

CMR vs SMR Hard DrivesNAS RAID Levels Explained

Similar Hard Drives

ModelBenchmarkPriceCompare
Altrix HD-6467 Ultra 2TB 5,400 RPM SMR Desktop Hard Drive701$59Compare
Strivon HD-4681 XT 6TB 5,400 RPM CMR Desktop Hard Drive1,408$129Compare
Strivon HD-3006 Ultra 24TB 7,200 RPM CMR NAS Hard Drive2,837$509Compare
Strivon HD-8719 Max 6TB 5,400 RPM CMR Surveillance Hard Drive1,750$179Compare
Novexa HD-1827 Ultra 24TB 7,200 RPM CMR NAS Hard Drive2,951$519Compare
Strivon HD-8066 XT 16TB 7,200 RPM CMR NAS Hard Drive1,957$249Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Novexa HD-1821 XT 20TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/3250463 (accessed 2026-10-20).