Ukrainian drones strike largest data center in Russia, multiple parts of 1.4 million square foot campus knocked offline

A Ukrainian drone attack damaged Yandex’s data center in Kaluga, Russia. Russian state media reported that several modules were completely taken out of operation. The strike came only two days after another Ukrainian drone attack hit Yandex’s facility in Sasovo and caused a major outage. The Kaluga incident therefore represents a second recent attack on Yandex’s digital infrastructure.

The facility sits in the Grabtsevo industrial park. It covers about 1.4 million square feet and has more than 3,800 server racks. Its 63-megawatt power capacity is around 50% higher than some other Yandex data centers. Yandex built it to house internal services and expand its cloud business.

The intended target has not been confirmed. The article also does not state the full extent of the outage or its effect on everyday users. However, the earlier Sasovo attack disrupted reports involving Yandex Mail, Disk, Documents, Pay, and Market. The Kaluga damage shows how one physical strike can affect many digital services.

A data center is a specialized facility where computer servers, storage systems, networking equipment, power supplies, and cooling systems operate together. It matters because websites, apps, cloud tools, email, and online payments need computers running continuously. Data centers provide the physical home for those computers and the connections that let users reach them.

In this case, Yandex’s Kaluga facility housed internal services and was built to support expansion of Yandex Cloud. More than 3,800 server racks occupied the complex, while a 63-megawatt power capacity supplied the equipment. The article does not identify every service hosted there, but it describes the site as a major part of Yandex’s infrastructure.

When a data center is damaged, services may slow, fail, or become unavailable if they depend on affected equipment. The exact impact depends on how systems are arranged and whether backup capacity exists elsewhere. After the earlier Sasovo strike, users reported trouble with Yandex Mail, Disk, Documents, Pay, and Market.

The Kaluga data center was enormous. It covered around 1.4 million square feet, or 130,000 square meters, across the Grabtsevo industrial park. Yandex designed it to become the largest data center in Russia. The scale matters because a larger site can hold more servers and support more digital services, although physical size alone does not reveal its exact computing output.

The facility had more than 3,800 server racks and a power capacity of 63 megawatts. That capacity was around 50% higher than some other Yandex data centers. Power capacity indicates how much electricity the site can provide to servers and supporting systems. It does not directly state how many calculations the computers can perform.

The article does not provide a specific computing-capacity number, such as processor count or cloud workload volume. It says the center housed Yandex’s internal services and was built to expand Yandex Cloud. Several modules were later removed from operation after the UAV attack, reducing the site’s available capacity.

Taking data-center modules offline can affect the everyday apps and websites that rely on them. Possible effects include failed logins, unavailable files, delayed payments, broken documents, or disrupted shopping services. The exact result depends on which equipment was damaged and whether the company can redirect users to functioning systems.

The article gives a concrete example from Yandex’s earlier Sasovo strike. Users reported problems with Yandex Mail, Disk, Documents, Pay, and Market. These services cover communication, file storage, document work, payments, and online shopping. Yandex said key services remained up and running, showing that an outage can be partial rather than total.

The Kaluga attack’s effect on everyday Russians was unclear when reported. Russian state media confirmed that several modules were completely taken out of operation, but the article did not list specific affected services. The incident could still matter because Kaluga housed Yandex’s internal services and supported its cloud expansion.

A server rack is a standardized frame or cabinet that holds multiple servers, storage units, network devices, and related equipment. Racks make dense computing easier to organize, power, cool, monitor, and repair. A data center can therefore fit large amounts of equipment into a controlled space.

In cloud computing, software workloads are spread across many servers. One group may process web requests, another may store files, and another may run databases or internal applications. Networking connects the machines, while management software assigns work and shifts it when equipment becomes busy or unavailable. Thousands of racks can provide a large combined pool of computing and storage resources.

Kaluga contained more than 3,800 server racks, making it a substantial computing site. The article says it housed Yandex’s internal services and was built to expand Yandex Cloud. It does not describe the precise arrangement of those racks. The reported loss of several modules shows that cloud capacity can be reduced in sections rather than disappearing all at once.

A company can keep services running by avoiding dependence on one physical location. It may copy data and applications to other data centers, divide workloads among separate modules, and maintain spare equipment. Automated systems can redirect users when one location fails. These designs create resilience, although they can add cost and complexity.

For example, email or cloud storage might operate from several sites at once. If one module loses power or networking, another module can handle some requests. Copies of important data can also help restore service. The effectiveness of this approach depends on whether backups are current, connected, and far enough away from the same danger.

The article confirms only that several Kaluga modules were taken out of operation. It does not explain Yandex’s backup arrangements or say whether other sites carried the affected workloads. The earlier Sasovo strike caused reported problems despite Yandex saying key services remained available. That suggests service continuity and user disruption can exist together.

Digital infrastructure matters in modern warfare because governments, companies, and civilians depend on online services. Data centers concentrate computers, storage, networks, and power in physical locations. Damaging one can interrupt services that support communication, business, data access, and cloud computing. The impact may spread beyond the facility itself when many users share its systems.

The article describes two recent Ukrainian drone strikes on Yandex facilities. The Sasovo attack caused a major outage, with users reporting problems involving Mail, Disk, Documents, Pay, and Market. At Kaluga, Russian state media said several modules were completely taken out of operation. The article also reports that Russian missiles struck a Ukrainian facility, taking the world’s second-largest torrent tracker offline.

These events show that digital infrastructure can have operational importance during conflict. However, the article does not establish the intended target of the Kaluga attack or quantify its wider consequences. It says only that attacks on digital infrastructure are continuing in both Russia and Ukraine.