Hardware Spec Index

Altrix HD-4521 Ultra 16TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD4521-ULTRA · Released 2020 · Updated 2026-10-19

Key facts

Benchmark index2,878 (Hard Drives scale)
Category rank#25,128
Street price$459
Power7 W
Performance per dollar6.27
Released2020

Specifications

BrandAltrix
ModelAltrix HD-4521 Ultra
Capacity16 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer260 MB/s
Workload rating300 TB/year
MTBF1.2 million hours
Helium-filledYes
Warranty3 years

Related guides

CMR vs SMR Hard DrivesNAS RAID Levels Explained

Similar Hard Drives

ModelBenchmarkPriceCompare
Mirenta HD-6439 XT 12TB 7,200 RPM CMR NAS Hard Drive2,106$269Compare
Mirenta HD-1506 Core 8TB 7,200 RPM CMR NAS Hard Drive1,707$229Compare
Altrix HD-8516 XT 12TB 7,200 RPM CMR Desktop Hard Drive2,607$399Compare
Novexa HD-4502 Ultra 20TB 7,200 RPM CMR Enterprise Hard Drive2,417$419Compare
Altrix HD-2789 XT 6TB 5,400 RPM CMR NAS Hard Drive1,555$149Compare
Novexa HD-3593 SE 20TB 7,200 RPM CMR Enterprise Hard Drive2,433$309Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Altrix HD-4521 Ultra 16TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/24259796 (accessed 2026-10-19).