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Synology 4-bay

Synology DS925+

CPU
AMD Ryzen V1500B
RAM
4 GB max 32 GB
Network
2 × 2.5GbE
M.2 / PCIe
2 / –

Model DS925+

Is the Synology DS925+ the right NAS?

Put 4 drives in SHR and one drive's worth goes on parity, leaving you 75% of what you paid for. (RAID still isn't a backup, mind.) The chip is an AMD Ryzen V1500B. Room for 32 GB of RAM (ECC, too) means a VM or two can sit alongside the containers.

Watch out for

If you need 10GbE, this isn't the box, as Synology lists no way to add it.

Two M.2 slots too, and Synology's expansion units take it up to 9 bays when you run out of room.

Usable space with 4 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 driveSHR (1 parity)SHR-2 (2 parity)
4 TB × 412 TB ≈ 10.9 TiB8 TB ≈ 7.3 TiB
8 TB × 424 TB ≈ 21.8 TiB16 TB ≈ 14.6 TiB
12 TB × 436 TB ≈ 32.7 TiB24 TB ≈ 21.8 TiB
16 TB × 448 TB ≈ 43.7 TiB32 TB ≈ 29.1 TiB
20 TB × 460 TB ≈ 54.6 TiB40 TB ≈ 36.4 TiB
24 TB × 472 TB ≈ 65.5 TiB48 TB ≈ 43.7 TiB

Specifications

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

Synology DS925+ specifications
Drive bays 4 bays source for Drive bays (synology.com, opens in new tab)
Max bays with expansion units 9 bays source for Max bays with expansion units (synology.com, opens in new tab)
CPU AMD Ryzen V1500B 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 4 GB source for Installed RAM (synology.com, opens in new tab)
Maximum RAM 32 GB source for Maximum RAM (synology.com, opens in new tab)
ECC RAM Yes source for ECC RAM (synology.com, opens in new tab)
1GbE ports 0 ports source for 1GbE ports (synology.com, opens in new tab)
2.5GbE ports 2 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 2 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