Hardware Spec Index

Altrix HD-3521 XT 12TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD3521-XT · Released 2020 · Updated 2026-10-24

Key facts

Benchmark index2,207 (Hard Drives scale)
Category rank#14,518
Street price$289
Power7 W
Performance per dollar7.64
Released2020

Specifications

BrandAltrix
ModelAltrix HD-3521 XT
Capacity12 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer240 MB/s
Workload rating300 TB/year
MTBF1.2 million hours
Helium-filledYes
Warranty3 years

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Cite this page: Hardware Spec Index, “Altrix HD-3521 XT 12TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/2956192 (accessed 2026-10-24).