TOKYO, Dec 9, 2024 - (JCN Newswire) - Hitachi, Ltd. (Hitachi) and NTT Communications Corporation (NTT Com) jointly announced today the successfuldemonstration of their planned distributed data center infrastructure, verifying its technical viability. The infrastructure deploys the Hitachi Virtual Storage Platform One Block (VSP One Block) provided by Hitachi Vantara*1 and the IOWN All-Photonics Network (APN)*2, a core technology of the IOWN initiative*3 that achieves ultra-high-speed and low power consumption.

VSP One Block is a storage solution that uses virtualization to manage multiple storage units across locations as a single entity, ensuring reliable business continuity during disasters. Recognized for its exceptional capabilities, it leverages best-in-class synchronous data replication and advanced protection technologies to enable seamlessrecovery and continuous operations. The IOWN APN, developed by the NTT Group, is a network technology that offers low power consumption, high capacity, low latency, and high-quality communication. During the demonstration, the combination of these two innovative solutions achieved round-trip times for long-distance data synchronization well within the times recommended by Hitachi, confirming that seamless system recovery is possible even during disasters.

An IOWN APN was used during the demonstration to connect two VSP One Block storage systems, creating avirtual environment with a simulatedseparation of 600 km, equivalent to the distance between Tokyo and Osaka.Data synchronization times weremeasured using Hitachi's Global-Active Device storage technology*4.

By improving the network’s response times through the superior network latency and reduced

jitter*5 of the IOWN APN resulted in a round-trip response time (within 20msec) was achieved that far exceeded Hitachi’s recommended network response time*6. This confirms that stable data synchronization can be establishedover such distances, verifying their practical feasibility. It is believed to be the first time anywhere in the world that constant data synchronization has been achieved over a distance of 600km*7.

Clustering technology, typically deployed within just a single data center, was used during the demonstration to evaluate likely system recovery times following a disaster. Redundancy was established between the two data centers, and a simulated failure was introduced at the main site to test whether operations could continue using thebackup site. Full system availability was automatically restored at the back-up site without any loss of data, confirming that seamless business continuity is possible even after a disaster.

The demonstration also highlighted that, during such times, there will be no need for system engineers to perform such tasks as switching from the main site to the sub-site or recovering lost data, thereby reducing staff workload. In addition, as there will no longer be a need to maintain multiple data sets asynchronously and back them up, storagecapacity can be reduced, resulting in lower IT infrastructure maintenance costs and reduced power consumption.

The demonstration was conducted collaboratively, with each company fulfilling the following roles:

• Hitachi / Hitachi Vantara: Virtual storage connection and evaluation of VSP One Block connectivity to the IOWN APN verification equipment
• NTT Com: APN functionality andperformance evaluation using theIOWN APN verification setup.

The increased frequency of major natural disasters in Japan and the corresponding need to strengthen resilience have accelerated the adoption ofdisaster recovery systems among

corporations in mission-critical sectors such as finance and infrastructure. However, the rising costs of systemconstruction and maintenance, the need to ensure business continuity during a disaster, and the extensive recoverytimes remain major burdens for companies in these sectors.

Simultaneously, the rise of generative AI is driving explosive growth in the demand for data processing, intensifying the environmental impact due to increased energy consumption. As a result, there are high expectations for the realization of distributed data centers across Japan that make use of green energy. This technical verification formspart of the efforts to enable real- time connectivity between geographically distant data centers, allowing businesses touse them as if they were a single, unified data center. By connecting data centers over long distances, it becomespossible to strategically locate them in regions with more space and renewable energy resources, thereby avoiding the concentration of data centers in urban areas.

Achieving the IOWN vision of a rich, inclusive society that embraces diversity requires the adoption of innovative technologies, such as optical networks and generative AI. Realizing sustainable data centers to support these advancements is critical to this goal.

Going forward, the combination of Hitachi Vantara and IOWN APN’s storage solutions aims to deliver next-generation IT infrastructure capable of real-time data synchronization over long distances. The system will cater to mission-critical industries, including financial institutions, telecommunications, energy, transportation companies, and cloud service operators. Additionally, Hitachi and NTT Com will continue to advance solutions that help achieve the efficient operation of distributed data centers and their joint efforts to create an environmentally friendly and resilient society.

(1) A data storage solution provided by Hitachi Vantara, featuring advanced data compression and protection technologies to streamline themanagement of growing data volumes and ensure stable system operation. It also reduces environmental impact throughout its product lifecycle. Please refer here for information on Hitachi’s storage solutions.
(2) A key technology of the IOWN initiative. This joint demonstration utilized NTT’s APN verification setup.
(3) Innovative Optical Wireless Network, NTT’s next-generation communication infrastructure initiative targeted for practical application around2030. Utilizing groundbreaking optical and wireless technologies, it aims to surpass the limitations of existing infrastructure, optimize systems comprehensively based on diverse information, and foster an inclusive and prosperous society.
(4) A technology that maintains constant synchronization between two storage systems, enhancing data availability.
(5) Fluctuations in network latency. Small fluctuations are referred to as “low jitter.”
(6) Write speed: 7.5msec, Read speed: 0.1msec or less confirmed
(7) Based on research conducted by NTT Com and Hitachi, as of November 2024.

About Hitachi, Ltd.

Hitachi drives Social Innovation Business, creating a sustainable society through the use of data and technology. We solve customers' and society's challenges with Lumada solutions leveraging IT, OT (Operational Technology) andproducts. Hitachi operates under the 3 business sectors of "Digital Systems & Services" – supporting our customers' digital transformation; "Green Energy & Mobility" – contributing to a decarbonized society through energy and railway systems, and "Connective Industries" – connecting products through digital technology to provide solutions in various industries. Driven by Digital, Green, and Innovation, we aim for growth through co-creation with ourcustomers. The company's revenues as 3 sectors for fiscal year 2023 (ended March 31, 2024) totaled 8,564.3 billion yen, with 573 consolidated subsidiaries and approximately 270,000 employees worldwide. For more information onHitachi, please visit the company's website at https://www.hitachi.com.

About Hitachi Vantara

Hitachi Vantara is transforming the way data fuels innovation. A wholly owned subsidiary of Hitachi, Ltd., Hitachi Vantara provides the data foundation the world's leading innovators rely on. Through data storage, infrastructuresystems, cloud management and digital expertise, the company helps customers build the foundation for sustainablebusiness growth. To learn more, visit www.hitachivantara.com.

About NTT Communications

NTT Communications solves global technology challenges by helping enterprises utilize managed IT-infrastructure solutions to overcome complexity and risk in their IT environments. These solutions are backed by our worldwide infrastructure, including industry-leading, global tier-1 public and private networks reaching over 190 countries/regions, the world's most advanced data-center facilities (more than 500,000m2) and cutting-edge technologies for cloud, security and AI. As the core provider of the DOCOMO group's enterprise-business services and solutions, we create value by providing global-scale support for restructuring in industry and society, newworkstyles and digital transformation in communities, leveraging 5G, IoT and other technologies under the "docomo business" brand. Together with NTT Ltd., NTT Data and NTT DOCOMO, we are the NTT Group.

www.ntt.com | Twitter@NTT Com | Facebook@NTT Com

For more information
Hitachi, Ltd.
Social Platform Sales Management Division
info_spe11@ml.itg.hitachi.co.jp

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