Hardware Spec Index

Altrix HD-3721 Pro 4TB 5,400 RPM CMR Surveillance Hard Drive

Hard Drives · Altrix · SKU HD3721-PRO · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index1,241 (Hard Drives scale)
Category rank#12,723
Street price$99
Power5 W
Performance per dollar12.54
Released2021

Specifications

BrandAltrix
ModelAltrix HD-3721 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

Related guides

CMR vs SMR Hard DrivesNAS RAID Levels Explained

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Cite this page: Hardware Spec Index, “Altrix HD-3721 Pro 4TB 5,400 RPM CMR Surveillance Hard Drive”, https://vextor7.com/item/2295673 (accessed 2026-10-19).