Hardware Spec Index

Altrix HD-4638 XT 12TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD4638-XT · Released 2020 · Updated 2026-10-20

Key facts

Benchmark index2,448 (Hard Drives scale)
Category rank#23,555
Street price$339
Power7 W
Performance per dollar7.22
Released2020

Specifications

BrandAltrix
ModelAltrix HD-4638 XT
Capacity12 TB
ClassNAS
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer240 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-2612 Ultra 2TB 5,400 RPM CMR Surveillance Hard Drive645$59Compare
Novexa HD-2053 Ti 6TB 5,400 RPM SMR Desktop Hard Drive894$69Compare
Altrix HD-6817 Ti 2TB 5,400 RPM CMR Surveillance Hard Drive634$59Compare
Altrix HD-1129 Pro 4TB 5,400 RPM CMR Surveillance Hard Drive596$49Compare
Novexa HD-4621 XT 12TB 7,200 RPM SMR Desktop Hard Drive1,491$169Compare
Strivon HD-4594 SE 12TB 7,200 RPM SMR Desktop Hard Drive1,878$259Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Altrix HD-4638 XT 12TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/2857571 (accessed 2026-10-20).