6/8/2026
Recommended Hard Drive Upgrade for Synology NAS System
Recommended configuration: 4 × 12TB Seagate IronWolf NAS drives (CMR) for optimal balance of cost, reliability, and performance in RAID 6 setup.
Alternative higher-end option is 4 × 16TB WD Red Pro for long-term expansion and enterprise durability.
6/8/2026
This are your options.
Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J)
Ultrastar Ultrastar DC HC555 Internal 3.5 in SAS 3.0 20TB 7200 RPM/512 MB Drive
6/8/2026
Seagate IronWolf
For NAS storage, Seagate IronWolf drives stand out as a purpose-built solution designed from the ground up for the demands of always-on, multi-drive enclosures. Unlike consumer desktop drives, IronWolf models are rated for continuous 24/7 operation and carry workload ratings of up to 180 TB/year (300 TB/year for IronWolf Pro), making them well-suited for environments running backups, media streaming, or surveillance workloads around the clock.
One of the most practical advantages of IronWolf drives is their built-in rotational vibration (RV) sensors. In a multi-bay NAS, the mechanical vibration generated by several spinning drives in close proximity can degrade read/write accuracy over time. IronWolf's RV sensors actively detect and compensate for this vibration in real time, preserving performance and reliability in exactly the kind of densely packed enclosure where these drives are most commonly deployed.
IronWolf drives also include support for IronWolf Health Management (IHM), a drive-level diagnostic feature that integrates directly with Synology's DSM software. Where standard SMART monitoring provides generic, one-size-fits-all health data, IHM delivers IronWolf-specific analysis — tracking usage patterns, environmental conditions, and wear indicators to provide early warnings before a failure occurs. For anyone managing a NAS with critical or irreplaceable data, that proactive visibility is a meaningful advantage over drives that rely on SMART alone.
4x 10TB drives using the SHR-2 format will give you 18.2TB of storage with 2-drive failure tolerance. SHR also gives you the flexibility to mix drive sizes later, if needed.