{"product_id":"western-digital-16tb-sata-6g-7-2k-rpm-lff-3-5-4kn-hdd-ultrastar-dc-hc550-wuh721816aln604","title":"Western Digital 16TB SATA 6G 7.2K RPM LFF 3.5\" 4Kn HDD Ultrastar DC HC550 WUH721816ALN604","description":"\u003cp\u003e\u003c!--StartFragment--\u003e\u003cmeta content=\"text\/html; charset=us-ascii\" http-equiv=\"Content-Type\"\u003e\n\u003cstyle type=\"text\/css\"\u003ea {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\n\u003c\/p\u003e\n\n\u003ch2 style=\"text-align: justify;\"\u003e\n\u003c!--StartFragment--\u003e\u003cmeta content=\"text\/html; charset=us-ascii\" http-equiv=\"Content-Type\"\u003e\n\u003cstyle type=\"text\/css\"\u003ea {\n    text-decoration: none;\n    color: #464feb;\n}\ntr th, tr td {\n    border: 1px solid #e6e6e6;\n}\ntr th {\n    background-color: #f5f5f5;\n}\n\u003c\/style\u003e\nWestern Digital Ultrastar DC HC550 WUH721816ALN604 16TB SATA 6Gb\/s 7200RPM 3.5\" Enterprise Hard Drive\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e WUH721816ALN604, 0F38353, 0F38477\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe \u003cstrong\u003eWestern Digital Ultrastar DC HC550 WUH721816ALN604\u003c\/strong\u003e is a high-capacity enterprise-class hard drive engineered for hyperscale cloud infrastructure, enterprise servers, SAN environments, storage arrays, and high-performance NAS deployments. Built on Western Digital's advanced \u003cstrong\u003eHelioSeal® helium platform\u003c\/strong\u003e, this 16TB hard drive delivers exceptional storage density, reliability, and power efficiency for 24\/7 mission-critical workloads.\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eFeaturing \u003cstrong\u003eCMR (Conventional Magnetic Recording)\u003c\/strong\u003e technology, \u003cstrong\u003e7200 RPM performance\u003c\/strong\u003e, and a \u003cstrong\u003eSATA 6Gb\/s interface\u003c\/strong\u003e, the HC550 is designed to meet the demanding requirements of modern data centers and enterprise storage applications.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e16TB Enterprise Storage Capacity\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003eSATA III 6Gb\/s Interface\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e7200 RPM Spindle Speed\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e3.5\" Large Form Factor (LFF)\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e4Kn (4K Native) Sector Format\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003eHelioSeal® Helium-Filled Technology\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003eCMR (Conventional Magnetic Recording)\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003eEnergy-Assisted Magnetic Recording (EAMR)\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e512MB Cache\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e24x7 Enterprise Operation\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e2.5 Million Hour MTBF\u003c\/strong\u003e\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003e\u003cstrong\u003e550TB Annual Workload Rating\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eCore Configuration\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eManufacturer: Western Digital\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eProduct Line: Ultrastar DC HC550\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eModel Number: WUH721816ALN604\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRelated Part Numbers: 0F38353, 0F38477\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCapacity: 16TB\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eForm Factor: 3.5\" LFF\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eInterface: SATA III 6Gb\/s\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSector Format: 4Kn (4096-Byte Native)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRecording Technology: CMR with EAMR\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePlatform: 9-Disk Helium-Sealed Architecture\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003ePerformance\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRotational Speed: 7200 RPM\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eCache: 512MB\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSustained Transfer Rate: Up to 262 MB\/s\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAverage Latency: 4.16 ms\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBurst Transfer Rate: Up to 600 MB\/s\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eReliability\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMTBF: 2.5 Million Hours\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eAnnualized Failure Rate (AFR): 0.35%\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eWorkload Rating: 550TB Per Year\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLoad\/Unload Cycles: 600,000\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise-Class 24\/7 Operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003ePower Requirements\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOperating Power: 8.8W\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eIdle Power: 5.6W\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eInput Voltage: +5V \/ +12V\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupports SATA Power Disable (PWDIS)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003ePhysical Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHeight: 26.1 mm\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eWidth: 101.6 mm\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDepth: 147 mm\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eWeight: Approximately 690g (1.52 lbs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003eEnterprise Compatibility\u003c\/h2\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eDell PowerEdge Servers\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eCompatible with most modern Dell PowerEdge servers using 3.5\" drive bays, including:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePowerEdge R740\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePowerEdge R750\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePowerEdge R760\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePowerEdge T550\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOther Gen14, Gen15, and Gen16 PowerEdge Platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eMay also be installed in some Gen13 systems such as the R730, although mounting may require using the front and rear screw positions due to the drive's enterprise chassis design.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eSupermicro Servers\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eCompatible with most:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupermicro 3.5\" Hot-Swap Trays\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupermicro Storage Servers\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupermicro Enterprise Chassis\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupermicro JBOD Systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe drive mounts directly into standard Supermicro metal and tool-less carriers.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eRAID Controller Compatibility\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eSupported Controllers\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H730\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H740P\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H755\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H345\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H355\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBroadcom \/ LSI 9300 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBroadcom \/ LSI 9400 Series\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eBroadcom \/ LSI 9500 Series\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003e\u003cstrong\u003eNot Recommended for\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H310\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC H710\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC S140\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PERC S150\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eOlder RAID controllers may not properly recognize 4Kn enterprise drives.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003eNAS \u0026amp; Storage Platform Compatibility\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eCompatible with:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSynology Enterprise RackStation Models\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eQNAP Enterprise Rackmount NAS Systems\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eTrueNAS Core\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eTrueNAS Scale\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eUnraid\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eProxmox\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eVMware ESXi\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise Storage Arrays\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSoftware RAID and ZFS Deployments using supported HBAs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eNot recommended for older consumer NAS devices or legacy storage systems that do not support 4Kn drives.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003eImportant 4Kn Format Information\u003c\/h2\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eThis Is NOT a Standard 512e Hard Drive\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThe \u003cstrong\u003eWUH721816ALN604\u003c\/strong\u003e ships as a \u003cstrong\u003e4Kn (4K Native)\u003c\/strong\u003e drive.\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003ePhysical Sectors: 4096 Bytes\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eLogical Sectors: 4096 Bytes\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eNo 512-byte emulation enabled by default\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eBecause this is a 4Kn model, compatibility depends on support from your:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eOperating System\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRAID Controller\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHBA\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eNAS Platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eModern operating systems such as Windows Server 2012+, Windows 10\/11, Linux, VMware ESXi, Proxmox, TrueNAS, and Unraid typically support 4Kn drives natively.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003ePower Disable (PWDIS) Notice\u003c\/h2\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eThis drive supports \u003cstrong\u003eSATA Pin 3 Power Disable\u003c\/strong\u003e technology.\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eEnterprise Servers\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eWorks normally in:\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eDell PowerEdge Backplanes\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eSupermicro Backplanes\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise Storage Enclosures\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eData Center Platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"text-align: justify;\"\u003eDesktop Systems\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eSome desktop power supplies provide 3.3V power on SATA Pin 3, which may prevent the drive from powering on.\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eIf using this drive in a desktop environment, additional configuration such as a Molex-to-SATA adapter or Pin 3 isolation may be required.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch2 style=\"text-align: justify;\"\u003eAdvanced Enterprise Technologies\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHelioSeal® 6th Generation Helium Platform\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eTriple Stage Actuator (TSA)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eRotational Vibration Safeguard (RVS)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eMedia Cache Plus Technology\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnergy-Assisted Magnetic Recording (EAMR)\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eEnterprise Vibration Protection\u003c\/li\u003e\n\t\u003cli style=\"text-align: justify;\"\u003eHigh-Density Multi-Drive Environment Optimization\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003ch3 style=\"text-align: justify;\"\u003ePlease Verify Compatibility Before Purchase\u003c\/h3\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eBecause this is a \u003cstrong\u003e4Kn enterprise hard drive\u003c\/strong\u003e, please verify that your server, RAID controller, NAS, or storage platform supports \u003cstrong\u003e4Kn (4K Native)\u003c\/strong\u003e drives before purchasing.\u003c\/p\u003e\n\n\u003cp style=\"text-align: justify;\"\u003eIf you provide your server model, NAS model, or RAID controller information, we can help verify compatibility prior to shipment.\u003c\/p\u003e\n","brand":"Western Digital","offers":[{"title":"Default Title","offer_id":41900409094217,"sku":"WUH721816ALN604","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/3868\/3209\/files\/e6e8c152-3fc2-5f8c-a05a-001eb9b4953f.png?v=1785273387","url":"https:\/\/parts.theserverstore.com\/products\/western-digital-16tb-sata-6g-7-2k-rpm-lff-3-5-4kn-hdd-ultrastar-dc-hc550-wuh721816aln604","provider":"The Server Store Parts","version":"1.0","type":"link"}