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Ultrastar DC HC650
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Shingled Magnetic Recoding for higher capacities
Data center decisions are driven by TCO. The Ultrastar DC HC650, with 20TB1 HDDs, play a leading role in reducing TCO.
The Increasing Demand for Higher Capacity HDDs
Cloud-based workloads continue to drive demand for high capacity HDDs. Content Delivery Networks (CDNs), artificial intelligence, machine learning, video analytics are just some examples of applications that are placing greater demands on storage. Data centers depend on higher capacity HDDs to create new business models and improve existing products and services while continually lowering their Total Cost of Ownership (TCO).
Host-Managed Shingled Magnetic Recording (SMR) for the Highest Capacities
The Ultrastar DC HC650 20TB HDD with host-managed SMR enables the highest capacity HDDs for data centers. Media tracks are overlapped (or ‘shingled’) with adjacent tracks, resulting in greater tracks per inch (TPI) to achieve increased areal density. SMR drives are specifically for sequential write environments. Data streams are organized and written sequentially. Adjacent tracks can be overlapped (or ‘shingled’). Overlapping tracks are grouped into bands, called zones, of fixed capacity for more effective data organization and partial update capability.
Raising the Capacity Bar with New Technologies
Ultrastar DC HC650 integrates a suite of technologies on a 9-disk platform to create a new class of HDDs. 20TB capacity is achieved by combining SMR with technologies that improve areal density, improve IOPS and reduce power consumption.
● The first internal hard drives in the industry to harness Energy-Assisted Magnetic Recording (EAMR) technology improves writability and therefore increases areal density.
● The industry’s first Triple Stage Actuator (TSA) enhances head-positioning accuracy, delivering better performance and increased areal density.
● HelioSeal® technology is the foundation for Western Digital’s high capacity HDDs and this is the 6th generation of HelioSeal product. Western Digital has shipped >65 million HelioSeal products to date.
規格
- Ideal for supporting data center workloads
- Integration of EAMR and TSA technologies
- Equipped with HelioSeal® and host-managed SMR
- Projected 2.5M hours MTBF
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- One MB is equal to one million bytes, one GB is equal to one billion bytes and one TB equals 1,000GB (one trillion bytes). Actual user capacity may be less due to operating environment.
- Projected values. Final MTBF and AFR specifications will be based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions, workload 220TB/year and temperature 40C. Derating of MTBF and AFR will occur above these parameters, up to 550TB writes per year and 60°C ambient (65°C device temp). MTBF and AFR ratings do not predict an individual drive’s reliability and do not constitute a warranty.
- Advanced Format drive: 4K (4096-byte) physical sectors.
- Portion of buffer capacity used for drive firmware
- Based on internal testing; performance may vary depending on host environment, drive capacity and other factors. 1MiB = 1,048,576 bytes (220), 1MB = 1,000,000 bytes (106)
- SATA models: Random RW 50/50 8KB QD=1, SAS models: Random RW 50/50 4KB QD=4
- Idle specification is based on use of Idle_A