Hardware Spec Index

Mirenta HD-6991 Ultra 4TB 5,400 RPM CMR Surveillance Hard Drive

Hard Drives · Mirenta · SKU HD6991-ULTRA · Released 2019 · Updated 2026-10-24

Key facts

Benchmark index794 (Hard Drives scale)
Category rank#49,218
Street price$49
Power5 W
Performance per dollar16.20
Released2019

Specifications

BrandMirenta
ModelMirenta HD-6991 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-6991 Ultra 4TB 5,400 RPM CMR Surveillance Hard Drive”, https://vextor7.com/item/591675 (accessed 2026-10-24).