On Wed, May 10, 2023 at 2:00 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > > > > On Mon, Apr 24, 2023, at 12:15 PM, Ben Cotton wrote: > > https://fedoraproject.org/wiki/Changes/BiggerESP > > > This change will increase the minimum size of the ESP to be 500MB, > > which is also the same value used by Microsoft for Windows 10 and > > newer. > > Issue 1: Currently anaconda calls mkdosfs on the ESP without any options and historically are reluctant to add non-default mkfs options. By default, mkdosfs will create a FAT 16 file system on a 500M (either SI or IEC units). The UEFI spec clearly prefers FAT 32 for the ESP on built-in drives. To my knowledge there haven't been any FAT 16 related bugs reported during the many years Fedora created FAT 16 ESPs. But it's probably better to create it as FAT 32. > > I don't know where the cutoff is in the mkdosfs code, but a 512MiB (IEC units) does result in a FAT 32 file system. So you might make it 512MiB. > > Issue 2: Last I checked (about 12 months ago), Windows 10 and 11 images from microsoft.com were still creating ~99M (I forget which units, and it may have been 100). That's consistent with: > > https://learn.microsoft.com/en-us/windows-hardware/manufacture/desktop/configure-uefigpt-based-hard-drive-partitions?view=windows-11 > > "The minimum size of this partition is 100 MB, and must be formatted using the FAT32 file format." > > So I'm not sure if Microsoft got the memo, and it's actually vendors' OEM images that are using large ESP size? > Microsoft has no reason to make it bigger. They have a system boot architecture that avoids having OS code on the ESP. Some OEMs preload extra recovery stuff and or extra environments, which might be where the bigger sizes come from. -- 真実はいつも一つ！/ Always, there's only one truth! _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx 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/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
