Hardware Spec Index

Altrix HD-4638 Ultra 20TB 7,200 RPM CMR Enterprise Hard Drive

Hard Drives · Altrix · SKU HD4638-ULTRA · Released 2026 · Updated 2026-10-18

Key facts

Benchmark index1,951 (Hard Drives scale)
Category rank#47,283
Street price$259
Power8 W
Performance per dollar7.53
Released2026

Specifications

BrandAltrix
ModelAltrix HD-4638 Ultra
Capacity20 TB
ClassEnterprise
RecordingCMR (conventional magnetic recording)
Spindle speed7,200 RPM
Cache512 MB
InterfaceSATA 6 Gb/s
Sustained transfer280 MB/s
Workload rating550 TB/year
MTBF2.5 million hours
Helium-filledYes
Warranty5 years

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Cite this page: Hardware Spec Index, “Altrix HD-4638 Ultra 20TB 7,200 RPM CMR Enterprise Hard Drive”, https://vextor7.com/item/1964643 (accessed 2026-10-18).