Hardware Spec Index

Mirenta HD-9521 Plus 20TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Mirenta · SKU HD9521-PLUS · Released 2023 · Updated 2026-10-21

Key facts

Benchmark index2,438 (Hard Drives scale)
Category rank#31,158
Street price$359
Power8 W
Performance per dollar6.79
Released2023

Specifications

BrandMirenta
ModelMirenta HD-9521 Plus
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

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Cite this page: Hardware Spec Index, “Mirenta HD-9521 Plus 20TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/6971460 (accessed 2026-10-21).