Mirenta NS-6491 Ultra 4-Bay NAS (1GbE)
NAS Systems · Mirenta · SKU NS6491-ULTRA · Released 2019 · Updated 2026-10-19
Key facts
| Benchmark index | 2,790 (NAS Systems scale) |
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| Category rank | #1,859 |
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| Street price | $459 |
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| Power | 40 W |
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| Performance per dollar | 6.08 |
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| Released | 2019 |
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Specifications
| Brand | Mirenta |
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| Model | Mirenta NS-6491 Ultra |
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| Drive bays | 4× 3.5"/2.5" SATA, hot-swappable |
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| Max raw capacity | 96 TB |
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| Processor | 4-core ARM, 1.7 GHz |
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| Memory | 4 GB DDR4 |
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| Network | 2× 1GbE |
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| M.2 NVMe slots | None |
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| PCIe expansion | None |
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| RAID | RAID 0/1/5/6/10, JBOD |
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| File system | Btrfs, ext4 |
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| USB | 2× USB 3.2 Gen 1 |
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Related guides
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| Mirenta NS-5487 Edge 5-Bay NAS (2.5GbE, M.2 Cache) | 3,997 | $729 | Compare |
| Halcyra NS-4873 Ultra 12-Bay NAS (10GbE, M.2 Cache) | 6,339 | $1,599 | Compare |
| Halcyra NS-2140 SE 2-Bay NAS (1GbE) | 1,939 | $189 | Compare |
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Cite this page: Hardware Spec Index, “Mirenta NS-6491 Ultra 4-Bay NAS (1GbE)”, https://vextor7.com/item/7305585 (accessed 2026-10-19).