Hardware Spec Index

Altrix HD-7556 XT 20TB 7,200 RPM CMR NAS Hard Drive

Hard Drives · Altrix · SKU HD7556-XT · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index2,833 (Hard Drives scale)
Category rank#45,577
Street price$599
Power8 W
Performance per dollar4.73
Released2021

Specifications

BrandAltrix
ModelAltrix HD-7556 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
Altrix HD-4924 SE 20TB 7,200 RPM CMR NAS Hard Drive2,141$299Compare
Mirenta HD-6070 Max 6TB 5,400 RPM CMR Surveillance Hard Drive1,154$99Compare
Altrix HD-3244 Pro 8TB 7,200 RPM CMR Desktop Hard Drive1,373$109Compare
Novexa HD-5136 SE 8TB 7,200 RPM CMR Surveillance Hard Drive1,814$239Compare
Mirenta HD-2334 SE 12TB 7,200 RPM SMR Desktop Hard Drive2,243$339Compare
Novexa HD-3433 Edge 2TB 5,400 RPM SMR Desktop Hard Drive1,028$69Compare

All Hard Drives · JSON

Cite this page: Hardware Spec Index, “Altrix HD-7556 XT 20TB 7,200 RPM CMR NAS Hard Drive”, https://vextor7.com/item/6573874 (accessed 2026-10-22).