{"product_id":"ultrastar-dc-hc550-18tb-sata-7200rpm-512mb-cache-helioseal","title":"Ultrastar DC HC550 18TB – SATA, 7200RPM, 512MB Cache, HelioSeal Enterprise HDD","description":"\u003ch2\u003e\u003cstrong\u003eWestern Digital Ultrastar DC HC550 18TB SATA HDD\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eUltrastar DC HC550 18TB\u003c\/strong\u003e is a high‑capacity, enterprise‑grade hard drive engineered for data centers, servers, cloud storage, and large‑scale backup environments. Built with Western Digital’s 6th‑generation \u003cstrong\u003eHelioSeal®\u003c\/strong\u003e technology, \u003cstrong\u003eEnergy‑Assisted Magnetic Recording (EAMR)\u003c\/strong\u003e, and \u003cstrong\u003eTriple Stage Actuator (TSA)\u003c\/strong\u003e, it delivers exceptional reliability, low power consumption, and industry‑leading areal density.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith \u003cstrong\u003e7200RPM\u003c\/strong\u003e, \u003cstrong\u003e512MB cache\u003c\/strong\u003e, and \u003cstrong\u003eSATA 6Gb\/s\u003c\/strong\u003e, the HC550 provides consistent throughput up to \u003cstrong\u003e269MB\/s\u003c\/strong\u003e, making it ideal for hyperscale deployments, RAID arrays, and long‑term archival storage.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Western Digital \u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e Ultrastar DC HC550 \u003cbr\u003e\u003cstrong\u003eCapacity:\u003c\/strong\u003e 18TB\u003cbr\u003e\u003cstrong\u003eForm Factor:\u003c\/strong\u003e 3.5‑inch\u003cbr\u003e\u003cstrong\u003eInterface:\u003c\/strong\u003e SATA 6Gb\/s \u003cbr\u003e\u003cstrong\u003eTransfer Rate:\u003c\/strong\u003e Up to 269MB\/s \u003cbr\u003e\u003cstrong\u003eDisk Speed:\u003c\/strong\u003e 7200 RPM \u003cbr\u003e\u003cstrong\u003eCache:\u003c\/strong\u003e 512MB \u003cbr\u003e\u003cstrong\u003eRecording Technology:\u003c\/strong\u003e EAMR (Energy‑Assisted Magnetic Recording) \u003cbr\u003e\u003cstrong\u003eSector Format:\u003c\/strong\u003e 512e \u003cbr\u003e\u003cstrong\u003eHelioSeal:\u003c\/strong\u003e Yes (6th generation)\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5‑Year Limited Warranty \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"text-base-strong sm:text-lg-strong pb-1 [\u0026amp;:not(:first-child)]:pt-3.5\"\u003e\u003cstrong\u003eDimensions \u0026amp; Weight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 5.79\" × 4\" × 1.03\" (L × W × H)\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 690g \u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"text-base-strong sm:text-lg-strong pb-1 [\u0026amp;:not(:first-child)]:pt-3.5\"\u003e\u003cstrong\u003eOperating Conditions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 5°C to 60°C \u003cbr\u003e\u003cstrong\u003eNon‑Operating Temperature:\u003c\/strong\u003e -40°C to 70°C\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eIndustry‑leading 18TB capacity\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eEnergy‑Assisted Magnetic Recording (EAMR)\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eTriple Stage Actuator (TSA) for precision head positioning\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eHelioSeal® for low power + high reliability\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eCMR recording for universal enterprise compatibility\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eOptimised for 24\/7 data‑center workloads\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eExcellent watts‑per‑TB efficiency\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMost Suitable For\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eData center\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eCloud storage\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eEnterprise servers\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eRAID arrays\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eBackup \u0026amp; archival storage\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eHigh‑capacity NAS system\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"WD","offers":[{"title":"Default Title","offer_id":55636874199416,"sku":"0F38459","price":599.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0235\/2028\/0653\/files\/Ultrastar_DC_HC550_18TB_SATA_7200RPM_512MB_Cache.webp?v=1787313500","url":"https:\/\/www.epsilonpc.co.uk\/products\/ultrastar-dc-hc550-18tb-sata-7200rpm-512mb-cache-helioseal","provider":"Epsilon PC","version":"1.0","type":"link"}