The Western Digital Ultrastar DC HC520 uses 4th-generation HelioSeal helium technology with an 8-disk design and PMR (Perpendicular Magnetic Recording) — an earlier, field-proven recording generation than the CMR-based HC550 and HC560, still rated for the same enterprise duty cycle.
Technical Specifications:
Capacity: 12TB
Interface: SATA 6Gb/s
RPM: 7200
Recording Technology: PMR (Perpendicular Magnetic Recording)
Form Factor: 3.5 inch
Workload Rating: 550TB/year
MTBF: 2.5 million hours
Warranty: 5-year limited
Byte Technologies stocks the HUH721212ALE604 for bulk and single-unit orders, with worldwide shipping and quote-based pricing available.








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