Hard disk WD Ultrastar DC HC560 3.5" 20 TB SATA, 7200RPM, 512MB

Model: Ultrastar DC HC560 20 TB, marked with a private number (P/N) 0F38785.

Form factor: 3.5″.

Interface: SATA 6 Gb/s (SATA III)

Rotation: 7200 RPM.

Cache memory (Buffer): 512 MB.

Recording technology: CMR (Conventional Magnetic Recording) + proprietary “OptiNAND™” technology, which uses embedded NAND (flash) to optimize metadata.

Capacity: 20TB.

OptiNAND™: Integration of iNAND UFS flash + traditional HDD mechanism. This enables richer metadata, higher recording density (tracks per inch), and better efficiency.

HelioSeal® technology: Helium sealing that reduces drag and vibration, helping with massive drives with multiple platters.

Designed for 24/7 operation and intensive workloads (enterprise grade).

Suitable for NAS, cloud storage, video archives, data centers.