World · Data Centers and Cloud
Yandex data center outage: official statement on Sasovo and Kaluga
Initial incident: 7–9 October 2026 · New source statement: 10 November 2026
In its 10 November 2026 statement, Yandex reported that access to 97.16% of Yandex Cloud customer data had been restored. It said the remaining 2.84% could not be recovered because of critical hardware damage and the absence of customer backups on the platform.
The percentages do not describe customer counts
These figures are the provider’s data-recovery statement, not a measure of affected customer counts or current service availability. Yandex also reported no data loss for customers who used its backup tools.
Backup default changes for new virtual machines
According to the same announcement, backup is now enabled by default for newly created virtual machines. Users can disable it in the management console; the service remains available on its previous terms. This change does not establish that every existing virtual machine has a retrospective backup.
Quad Bilişim comment
The percentage of recovered data and whether a particular application is operational are different questions. The new statement clarifies the data-recovery outcome following the October incident; it does not by itself establish every customer’s business-continuity outcome.
Source information
Yandex: data-recovery statement of 10 November 2026
The figures in the 10 November statement are the provider’s claims. The October incident, source date and this article’s 11 November update are distinguished. The Quad Bilişim comment is editorial analysis.
