https://blog.gistre.epita.fr/tags/postmortem/ Recent content in postmortem on The Gistre Blog Hugo -- gohugo.io fr Tue, 22 Sep 2026 12:14:43 +0000 https://blog.gistre.epita.fr/posts/luca.sarubbi-2026-07-24-the_77tb_footgun/ Tue, 22 Sep 2026 12:14:43 +0000 https://blog.gistre.epita.fr/posts/luca.sarubbi-2026-07-24-the_77tb_footgun/ In December 2021, a modified backup script deleted 77 TB of research data from Kyoto University’s supercomputer. This article rebuilds the failure chain with live demos: how bash reads a running script from an open file descriptor, what an inode is, why cp and mv treat it differently, and how one pair of missing quotes turns a log cleanup into a mass deletion.