On Fr, 10.10.25 13:12, Chris Murphy ([email protected]) wrote: > On Fri, Oct 10, 2025, at 2:41 AM, Vitaly Zaitsev via devel wrote: > > Using an unjournaled VFAT file system on the /boot partition is only > > acceptable on laptops or desktop computers with a UPS. On all other > > configurations, it is unacceptable, as a power failure, system freeze, > > etc., while writing to this file system can easily corrupt it and leave > > the system in unusable state. > > As it turns out, GRUB does not do log replay for ext4, XFS or Btrfs.
Moreover the last time I looked it writes boot counter updates and such directly to disk, bypassing the file system log. That's really evil, and certainly doesn't help integrity guarantees. (And as mentioned elsewhere, you cannot avoid VFAT because mandated by UEFI for ESP, and the data there has similar update/write cycles as /boot, so nothing is gained by a different fs) Lennart -- Lennart Poettering, Berlin -- _______________________________________________ devel mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected] Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
