Hardware Spec Index

Mirenta HD-7721 Prime 4TB 5,400 RPM CMR Surveillance Hard Drive

Hard Drives · Mirenta · SKU HD7721-PRIME · Released 2021 · Updated 2026-10-18

Key facts

Benchmark index680 (Hard Drives scale)
Category rank#39,496
Street price$49
Power5 W
Performance per dollar13.88
Released2021

Specifications

BrandMirenta
ModelMirenta HD-7721 Prime
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-7721 Prime 4TB 5,400 RPM CMR Surveillance Hard Drive”, https://vextor7.com/item/17528140 (accessed 2026-10-18).