Synology DS225+ 2-bay NAS + 2 x 4 TB Hard Drives (RAID1)

The Synology DiskStation DS225+ is a compact 2-bay NAS designed to centralize, share, and protect your files at home or in a small office. In this configuration with 2 x 4TB hard drives in RAID 1, your data is duplicated on both drives to improve fault tolerance (if one drive fails, the other retains a copy).

Key features of the DS225+

• 2 SATA bays (3.5" / 2.5" drives)

• Intel Celeron J4125 processor (4 cores, 2.0–2.7 GHz)

• 2 GB DDR4 memory (expandable up to 6 GB)

• Network: 1× 2.5 GbE + 1× 1 GbE (faster transfers on compatible network)

• Advertised performance: up to ~282 MB/s read and ~217 MB/s write (sequential)

• Synology DSM OS: backup applications, private cloud, sharing/syncing, and video surveillance (up to 25 IP cameras advertised by Synology)

Capacity with 2x4TB in RAID 1

• Raw capacity: 8 TB

• Usable capacity: ≈ 4 TB (the second drive acts as a mirror)

• Goal: security / continuity, not space gain

What is it used for in practice?

• Automatic backups for PC/Mac, servers, mobiles

• File sharing (user rights, links, remote access)

• Private cloud (Synology Drive)

• Multimedia server (photo/video library)

• Video surveillance (Surveillance Station)