Toshiba N300 12TB 3.5" 7200 RPM 512MB CMR SATA internal hard drive HDWG51CUZSVA

12TB NAS hard drive for multi-bay enclosures

The Toshiba N300 HDWG51CUZSVA is a 12TB desktop internal hard drive built for network-attached storage systems. It targets home and small-business users who need large-capacity, always-on storage in a 3.5-inch form factor. The drive is new and uses conventional magnetic recording technology.

CMR recording technology for RAID arrays

The single specification that determines suitability is the CMR recording technology. Unlike shingled magnetic recording drives, CMR writes data in parallel tracks without overlapping, delivering consistent write performance during rebuilds and sustained RAID workloads. This makes the drive appropriate for multi-drive NAS environments where steady throughput matters.

7200 RPM with 512MB cache under continuous operation

At 7200 RPM and with a 512MB cache, the drive maintains stable transfer rates during long sequential reads and writes typical of NAS duties such as backups, media streaming and file sharing. The SATA 6.0Gb/s interface does not saturate under these sustained loads, so the mechanical speed and cache depth define real-world throughput rather than burst-speed figures.