Western Digital Blue WD10EARZ. HDD size: 3.5", HDD capacity: 1 TB, HDD speed: 5400 RPM

Western Digital Ultrastar DC SN655. SSD capacity: 15.4 TB, SSD form factor: U.3, Read speed: 6800 MB/s, Write speed: 3700 MB/s, Component for: Server/workstation

24TB data center HDD with OptiNAND technologyThe relentless growth of data means organizations must find ways to efficiently store ever more data. The Ultrastar DC HC580 24TB1 HDD with improved OptiNAND technology is the next step in high-capacity hard drives, allowing data centers to maximize their storage, especially in footprint- and powerconstrained environments.Keep up with exponential data growthThe 24TB1 Ultrastar DC HC580 HDD with OptiNAND technology’s capacity-enabling features provides more efficient storage on a 10-disk CMR drive, enabling you to store more in the same footprintInnovative technologies for higher capacitiesImproved OptiNAND technology, energy-assisted magnetic recording (EAMR), triplestage actuator (TSA), and HelioSeal enable high capacity with low powerPerformance and protectionArmorCache is a feature enabled by OptiNAND that offers higher performance in write cache disabled mode and provides enterprise power loss protection in write cache enabled modeDesigned for data center workloadsThe Ultrastar DC HC580 is performance-optimized to handle heavy application workloads of up to 550TB2 per year.Built with reliability in mindThis robust drive delivers dependability in intense data center environments with up to 2.5M hours MTBF3 (projected).

Economical Capacities and Fast Data Access for the Data Center The Ultrastar® DC HA340 HDD in 4TB, 6TB, and 8TB delivers efficiency and performance for traditional and legacy systems based on proven CMR technology. Designed for a variety of applications including traditional storage arrays, rack-mounted storage enclosures and server-based storage systems, these drives are offered at 7,200 RPM with 6Gb/s SATA and Advanced Format 512e format.Technology innovation delivers efficiency and performance for legacy systemsAddress data center requirements by providing legacy capacities from 4TB to 8TB while implementing the latest in HDD storage technologies. Proven and cost-efficient designUltrastar DC HA340 drives are based on an air-based HDD platform with Conventional Magnetic Recording (CMR) technology in a 3.5-inch form factor.   Performance and protection These 4TB, 6TB, and 8TB HDD’s leverage a dual-stage microactuator to enhance head positioning accuracy for better drive performance.   Designed for data center workloadsThe Ultrastar DC HA340 is performance-optimized to handle heavy application workloads of up to 550TB2 per year. Built with reliability in mind This robust drive delivers dependability in intense data center environments with up to 2M hours MTBF3 (projected).  Quality and securityProvides additional peace of mind with a 5-year limited warranty. 

Enterprise-class hard drives engineered to deliver high performance and reliability to commercial and enterprise NAS environments.WD Red® Pro drives are engineered to handle high-intensity workloads in 24×7 multi-user commercial and enterprise NAS environments. WD Red Pro drives deliver the performance, scalability and dependability businesses require to store, share and collaborate on large amounts of data in multi-bay RAID-optimized NAS systems.Optimized for NAS with NASware™Western Digital’s exclusive NASware™ technology fine tunes drive parameters to match NAS system workloads, which helps increase performance and reliability.Designed for Continuous OperationWD Red Pro hard drives are designed to handle the rigorous demands of high-intensity 24x7 multi-user NAS environments and increase system durability.Tested for Dependable CompatibilityWestern Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures.Protected against Excessive VibrationWD Red Pro drives include Rotation Vibration (RV) sensors that anticipate and proactively counteract disturbances caused by increased vibration. By dispersing excess vibration across the drive chassis, turbulence is minimized, performance is maintained and drives are protected.Built to Absorb ShockWD Red Pro hard drives include a multi-axis shock sensor to detect subtle shock events and automatically compensate with dynamic fly height technology to further protect the drives in NAS enclosures.Engineered with Industry-Leading TechnologyWD Red Pro 22TB and 24TB hard drives feature Western Digital’s proprietary OptiNAND™ technology which leverages integrated iNAND embedded flash to perform key housekeeping functions, freeing up more capacity and improving the overall drive performance.Backed by World-Class Support and WarrantyAs an industry-leading hard drive manufacturer, Western Digital stands behind their NAS storage solutions with the assurance of a 5-year limited warranty and world-class support services for hassle free data storage.