Hardware Spec Index

Mirenta HD-3121 Ultra 4TB 5,400 RPM CMR Surveillance Hard Drive

Hard Drives · Mirenta · SKU HD3121-ULTRA · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index1,332 (Hard Drives scale)
Category rank#38,881
Street price$139
Power5 W
Performance per dollar9.58
Released2021

Specifications

BrandMirenta
ModelMirenta HD-3121 Ultra
Capacity4 TB
ClassSurveillance
RecordingCMR (conventional magnetic recording)
Spindle speed5,400 RPM
Cache256 MB
InterfaceSATA 6 Gb/s
Sustained transfer180 MB/s
Workload rating180 TB/year
MTBF1 million hours
Helium-filledNo
Warranty2 years

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Cite this page: Hardware Spec Index, “Mirenta HD-3121 Ultra 4TB 5,400 RPM CMR Surveillance Hard Drive”, https://vextor7.com/item/4393757 (accessed 2026-10-20).