{"product_id":"wd-ultrastar-hc555-12tb-sas-hdd","title":"WD Ultrastar HC555 12TB SAS Hard Drive - EAMR, Helium, 7200 RPM, 3.5-Inch (0B47741)","description":"\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eWestern Digital Ultrastar HC555 12TB SAS Data Center Hard Drive with Energy-Assisted Magnetic Recording, HelioSeal Helium Technology, Triple-Stage Actuator, and 285-Year MTBF for High-Intensity 24\/7 Data Center Workloads\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca href=\"\/collections\/western-digital\"\u003eWestern Digital\u003c\/a\u003e Ultrastar HC555 WUH722012CL5204 (0B47741) is a 12TB helium-filled enterprise SAS hard drive that delivers 7200 RPM performance, 512 MB buffer, and Energy-Assisted Magnetic Recording (EAMR) technology in a standard 3.5-inch form factor for 24\/7 multi-user data center environments. The HC555 uses Western Digital's HelioSeal helium technology to reduce internal turbulence and power consumption, while the Triple-Stage Actuator (TSA) increases tracks-per-inch density for greater capacity with precise head positioning and lower power draw.\u003c\/p\u003e\n\u003cp\u003eBuilt on a platform deployed in thousands of data centers worldwide, the HC555 delivers a 285.2-year MTBF rating for predictable reliability at scale. Built-in Rotational Vibration (RV) sensors counteract disturbances from adjacent drives in dense storage enclosures, and multi-axis shock sensors with dynamic fly height technology protect data during rack-level events. The 512e disk format provides compatibility with Windows, Windows Server, and Linux operating systems, and the SAS interface provides dual-port connectivity for multipath I\/O in high-availability storage architectures.\u003c\/p\u003e\n\u003ch3\u003eWhere the WD Ultrastar HC555 12TB Fits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-intensity 24\/7 data center storage tiers\u003c\/strong\u003e where the EAMR recording technology enables higher areal density with proven reliability, the 285.2-year MTBF provides predictable failure rates for large drive fleet management, and the HelioSeal helium technology delivers lower power consumption per terabyte than air-filled enterprise drives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDense multi-drive server and JBOD enclosures\u003c\/strong\u003e where the built-in RV sensors and multi-axis shock sensors maintain consistent performance when multiple drives create vibration in shared chassis, the SAS interface supports dual-port multipath I\/O for high-availability controllers, and the TSA provides precise head positioning in vibration-prone environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCloud, hyperscale, and distributed storage architectures\u003c\/strong\u003e where the 12TB capacity provides a balance of density and cost per bay for block and file storage workloads, the 7200 RPM spindle with 512 MB buffer handles mixed read\/write enterprise workloads, and the field-proven platform enables rapid qualification and seamless integration into existing infrastructure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat the WD Ultrastar HC555 12TB Delivers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12TB Helium Enterprise SAS:\u003c\/strong\u003e 12TB capacity with SAS interface. EAMR recording technology for higher areal density. HelioSeal helium technology for lower power and turbulence. 512e disk format.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7200 RPM with TSA:\u003c\/strong\u003e 7200 RPM spindle speed with 512 MB buffer. Triple-Stage Actuator for precise head positioning and higher TPI. 285.2-year MTBF rating for enterprise reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration and Shock Protection:\u003c\/strong\u003e Built-in RV sensors for dense multi-drive enclosures. Multi-axis shock sensors with dynamic fly height technology. Designed for continuous 24\/7 multi-user data center operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5-Inch Form Factor:\u003c\/strong\u003e Standard 3.5-inch LFF chassis at 4 x 5.8 x 1 inches. Compatible with Windows, Windows Server, and Linux. Dual-port SAS for multipath I\/O.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Western Digital Corporation","offers":[{"title":"Default Title","offer_id":52326607225016,"sku":"0B47741","price":644.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/9110\/4952\/files\/1082959750.jpg?v=1764186963","url":"https:\/\/islandelectricalsupply.com\/products\/wd-ultrastar-hc555-12tb-sas-hdd","provider":"Island Electrical Supply","version":"1.0","type":"link"}