Hardware Spec Index

Mirenta HD-9255 Ultra 20TB 7,200 RPM CMR Enterprise Hard Drive

Hard Drives · Mirenta · SKU HD9255-ULTRA · Released 2019 · Updated 2026-10-21

Key facts

Benchmark index3,100 (Hard Drives scale)
Category rank#35,990
Street price$539
Power8 W
Performance per dollar5.75
Released2019

Specifications

BrandMirenta
ModelMirenta HD-9255 Ultra
Capacity20 TB
ClassEnterprise
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer280 MB/s
Workload rating550 TB/year
MTBF2.5 million hours
Helium-filledYes
Warranty5 years

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Cite this page: Hardware Spec Index, “Mirenta HD-9255 Ultra 20TB 7,200 RPM CMR Enterprise Hard Drive”, https://vextor7.com/item/2996733 (accessed 2026-10-21).