Hardware Spec Index

Altrix HD-4921 Core 20TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD4921-CORE · Released 2025 · Updated 2026-10-25

Key facts

Benchmark index2,558 (Hard Drives scale)
Category rank#49,543
Street price$479
Power8 W
Performance per dollar5.34
Released2025

Specifications

BrandAltrix
ModelAltrix HD-4921 Core
Capacity20 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer280 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
Novexa HD-6441 Max 6TB 5,400 RPM CMR NAS Hard Drive1,091$79Compare
Mirenta HD-2728 Max 12TB 7,200 RPM CMR Surveillance Hard Drive1,791$169Compare
Mirenta HD-2570 Max 16TB 7,200 RPM CMR Enterprise Hard Drive2,296$379Compare
Strivon HD-1829 Core 16TB 7,200 RPM CMR NAS Hard Drive2,381$369Compare
Mirenta HD-1459 Ti 20TB 7,200 RPM CMR Enterprise Hard Drive2,147$329Compare
Altrix HD-1515 Core 16TB 7,200 RPM CMR NAS Hard Drive2,013$249Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Altrix HD-4921 Core 20TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/4247848 (accessed 2026-10-25).