Hardware Spec Index

Altrix HD-3646 XT 20TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD3646-XT · Released 2024 · Updated 2026-10-25

Key facts

Benchmark index2,873 (Hard Drives scale)
Category rank#8,123
Street price$469
Power8 W
Performance per dollar6.13
Released2024

Specifications

BrandAltrix
ModelAltrix HD-3646 XT
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-8844 Prime 16TB 7,200 RPM CMR Enterprise Hard Drive2,083$239Compare
Novexa HD-8853 Pro 16TB 7,200 RPM CMR NAS Hard Drive1,856$189Compare
Novexa HD-8931 Ti 12TB 7,200 RPM SMR Desktop Hard Drive1,819$189Compare
Mirenta HD-7681 Edge 6TB 5,400 RPM CMR Desktop Hard Drive1,285$129Compare
Mirenta HD-8720 Ti 8TB 7,200 RPM SMR Desktop Hard Drive1,659$159Compare
Mirenta HD-2244 Ti 8TB 7,200 RPM CMR Surveillance Hard Drive1,733$179Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Altrix HD-3646 XT 20TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/46062222 (accessed 2026-10-25).