Sasovo

Yandex Data Center Attacks Trigger Outages, Cloud Disruptions and Stock Decline

A series of physical attacks has disabled or partially damaged multiple Yandex data centers in Russia, leading to prolonged service outages across cloud and consumer platforms. Fires and power failures struck facilities in Sasovo, Kaluga and Vladimir between 8 and 11 October, forcing the company to shift workloads to the remaining Mytishchi site. Analysts from Finam, Rikom-Trust and Freedom Global note that recovery timelines now stretch from several months to two years for specialized hardware such as supercomputers. The incidents have already erased nearly 9 percent of Yandex share value and raised concerns over future capital expenditure, client retention in Yandex Cloud and potential sanctions complications for overseas expansion. Experts emphasize that the attacks have moved from isolated technical failures to a systemic business-continuity and investment-risk issue.

Yandex Disk Files Become Partially Inaccessible After Sasovo Data Center Incident

A detailed user report reveals that approximately one percent of files stored on Yandex Disk are currently unavailable for download following reported incidents at the Sasovo data center. The problems manifest in three distinct states: missing thumbnails with downloadable originals, visible thumbnails with inaccessible originals returning 504 Gateway Time-out errors, and cases where both thumbnails and originals fail to load. Technical analysis using curl requests traced the failures to specific storage nodes such as s418klg.storage.yandex.net, indicating that some data shards may reside in affected infrastructure while others remain operational. Yandex support requested original files for diagnosis but closed the ticket without providing an official explanation or confirming data integrity. The author emphasizes that the issue affects files across both the Photos and Files sections and recommends maintaining offline backups due to the lack of guaranteed availability during data center failures.