Hardware Spec Index

Altrix HD-9721 Ultra 28TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD9721-ULTRA · Released 2025 · Updated 2026-10-26

Key facts

Benchmark index2,929 (Hard Drives scale)
Category rank#30,071
Street price$559
Power9 W
Performance per dollar5.24
Released2025

Specifications

BrandAltrix
ModelAltrix HD-9721 Ultra
Capacity28 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer320 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-9721 Ultra 28TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/94097590 (accessed 2026-10-26).