Hardware Spec Index

Altrix HD-8521 XT 20TB 7,200 RPM CMR Enterprise Hard Drive

Hard Drives · Altrix · SKU HD8521-XT · Released 2024 · Updated 2026-10-26

Key facts

Benchmark index2,664 (Hard Drives scale)
Category rank#14,588
Street price$529
Power8 W
Performance per dollar5.04
Released2024

Specifications

BrandAltrix
ModelAltrix HD-8521 XT
Capacity20 TB
ClassEnterprise
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer280 MB/s
Workload rating550 TB/year
MTBF2.5 million hours
Helium-filledYes
Warranty5 years

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Cite this page: Hardware Spec Index, “Altrix HD-8521 XT 20TB 7,200 RPM CMR Enterprise Hard Drive”, https://vextor7.com/item/886448 (accessed 2026-10-26).