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Synology 2-bay

Synology DS225+

CPU
Intel Celeron J4125
RAM
2 GB max 6 GB
Network
1 × 2.5GbE, 1 × 1GbE
M.2 / PCIe
0 / –

Model DS225+

Is the Synology DS225+ the right NAS?

Two drives in SHR or RAID 1 means each holds a full copy, which is the simplest protection there is and needs no planning at all. It's an Intel Celeron J4125 in there, for the record.

Watch out for

No 10GbE, and Synology doesn't list a PCIe slot to add it. The 6 GB RAM ceiling is tight. Keep it to file sharing and a few light containers. You'll lose half of every pound you spend on drives to the mirror. That's the price of two bays.

Usable space with 2 matching drives

These are decimal TB, the way drive boxes count them, and Windows will show roughly 9% less. Got a mix of sizes? Put your own drives in the calculator and it'll work out the layers.

Each driveMirror (SHR or RAID 1)
4 TB × 24 TB ≈ 3.6 TiB
8 TB × 28 TB ≈ 7.3 TiB
12 TB × 212 TB ≈ 10.9 TiB
16 TB × 216 TB ≈ 14.6 TiB
20 TB × 220 TB ≈ 18.2 TiB
24 TB × 224 TB ≈ 21.8 TiB

Specifications

Taken from Synology's own spec page, and "Not published" means they don't list it.

Synology DS225+ specifications
Drive bays 2 bays source for Drive bays (synology.com, opens in new tab)
CPU Intel Celeron J4125 source for CPU (synology.com, opens in new tab)
CPU cores 4 cores source for CPU cores (synology.com, opens in new tab)
CPU architecture x86-64 source for CPU architecture (synology.com, opens in new tab)
Installed RAM 2 GB source for Installed RAM (synology.com, opens in new tab)
Maximum RAM 6 GB source for Maximum RAM (synology.com, opens in new tab)
ECC RAM No source for ECC RAM (synology.com, opens in new tab)
1GbE ports 1 ports source for 1GbE ports (synology.com, opens in new tab)
2.5GbE ports 1 ports source for 2.5GbE ports (synology.com, opens in new tab)
10GbE ports 0 ports source for 10GbE ports (synology.com, opens in new tab)
M.2 NVMe slots 0 slots source for M.2 NVMe slots (synology.com, opens in new tab)
PCIe slots Not published
Warranty 3 years source for Warranty (synology.com, opens in new tab)

Sources: synology.com