Western Digital Ultrastar DC HC560 WUH722020BLE604 / WUH722020ALE6L4 20TB SATA
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  • Part number:WUH722020BLE604 / WUH722020ALE6L4
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Western Digital Ultrastar DC HC560 WUH722020BLE604 WUH722020ALE6L4 20TB 7200RPM SATA 6Gb/s 3.5" Helium Enterprise Server Hard Drive 512MB Cache CMR

Keywords WUH722020BLE604, WUH722020ALE6L4, WD HC560 20TB, Ultrastar DC HC560, 20TB enterprise HDD, 3.5 inch SATA hard disk, 7.2K helium hard drive, CMR recording, HelioSeal, 512MB cache, data center storage, cloud storage, enterprise NAS HDD Description WUH722020BLE604 and WUH722020ALE6L4 belong to Western Digital Ultrastar DC HC560 enterprise helium hard disk family, high-capacity 3.5-inch CMR mechanical HDD engineered for 24×7 continuous data center operation. Equipped with 20TB raw capacity, 7200RPM rotational speed and large 512MB cache, standard SATA III 6Gb/s interface with HelioSeal helium-sealed enclosure and advanced OptiNAND & ePMR recording technology. Rated with 550TB annual workload and 2,500,000 hours MTBF, low power consumption for dense rack deployment. Optimized for cloud storage, enterprise NAS, backup archive and big data warehouse, delivering high cost-efficiency for large-scale storage capacity expansion. Key Features Original WD Ultrastar DC HC560 series, two part numbers: WUH722020BLE604 & WUH722020ALE6L4 (both 20TB SATA version) 3.5-inch standard LFF form factor with HelioSeal 7th-gen hermetic helium sealing design, lower internal air resistance and reduced power draw SATA 6Gb/s high-speed interface, backward compatible with SATA 3Gb/s, seamless matching with mainstream server RAID & storage enclosures 7200RPM spindle speed plus 512MB large cache, stable sustained read speed up to 285MB/s, outstanding sequential & random performance Pure CMR conventional magnetic recording, no SMR limitation, perfect for frequent overwrite, RAID array and high random write enterprise workload OptiNAND + ePMR advanced storage technology to realize 20TB high capacity with optimized disk density Enterprise-grade 24/7 non-stop running certification, supporting fixed 550TB annual written workload for data center cyclic operation Ultra-high reliability with 2.5 million hours MTBF rating, built-in anti-vibration & anti-shock mechanism for cluster rack working environment Optimized low-power architecture, cutting per-TB power consumption to lower overall data center OPEX Official 5-year limited enterprise warranty, strict factory reliability screening for bulk data center batch deployment Basic Specification Item Parameter Part Number WUH722020BLE604 / WUH722020ALE6L4 Product Line Western Digital Ultrastar DC HC560 Capacity 20TB Form Factor 3.5 inch LFF, 26.1mm height Interface SATA III 6Gb/s Rotational Speed 7200 RPM (7.2K) Cache Buffer 512MB Recording Tech CMR + ePMR + OptiNAND Max Sustained Read Up to 285MB/s Annual Workload Rate 550TB / Year MTBF 2,500,000 Hours Dimensions 147 × 101.6 × 26.1 mm Weight Approx 750g Operating Temperature 0°C ~ 60°C Warranty 5 Years WD Official Enterprise Warranty Application Cloud Data Center, Enterprise NAS/SAN, Backup Archive, Big Data Storage, Video Surveillance Array Compatibility Compatible with all mainstream 3.5-inch SATA slot rack servers including Dell PowerEdge R750/R760, Lenovo ThinkSystem SR series, Inspur NF rack server series. Fully supports Windows Server, Linux, VMware ESXi, FreeNAS and mainstream enterprise OS; matches standard SATA RAID adapters, enterprise SAN/NAS storage enclosures, Ceph & OpenStack object storage platforms, plug-and-play for old storage array upgrade and capacity expansion. Usage Scenarios Large-scale cloud data center high-density bulk storage & object storage cluster Enterprise-grade NAS private cloud, SMB centralized file storage and resource pooling Data warehouse, big data analysis, Hadoop distributed storage primary & secondary disk Enterprise disk-to-disk offline backup, long-term cold data archiving & compliance data retention HD video surveillance centralized storage, media asset library massive content saving Cost-effective storage server batch upgrade to reduce overall TCO of data center construction FAQ Q1: What is the difference between WUH722020BLE604 and WUH722020ALE6L4? A: Both are identical 20TB HC560 SATA CMR helium enterprise HDD with same core specification, only different OEM batch part codes for WD different supply channels, interchangeable in deployment. Q2: Is this HC560 20TB SMR or CMR? A: Full CMR conventional magnetic recording design without SMR, no random write performance drop, suitable for enterprise frequent write RAID environment. Q3: Can this hard drive run 7×24 continuous operation? A: Yes, HelioSeal helium enterprise construction, 550TB yearly workload and 2.5 million MTBF, specially designed for uninterrupted data center long-term running.
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