Hardware Spec Index

Mirenta HD-9421 Pro 4TB 5,400 RPM CMR Surveillance Hard Drive

Hard Drives · Mirenta · SKU HD9421-PRO · Released 2026 · Updated 2026-10-23

Key facts

Benchmark index1,010 (Hard Drives scale)
Category rank#11,445
Street price$79
Power5 W
Performance per dollar12.78
Released2026

Specifications

BrandMirenta
ModelMirenta HD-9421 Pro
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-9421 Pro 4TB 5,400 RPM CMR Surveillance Hard Drive”, https://vextor7.com/item/17826951 (accessed 2026-10-23).