I saw an issue related to 4k/512b devices on the md/fs lists. Basically if a fs was built for 512 it cannot be run as 4k so it sounds like there is a significant risk if one was to use pvmove and move a current 512b filesystem over to a 4k disk. lvm mght just refuse to do it.
It also sounds like mixing 512 and 4k devices in lvm/dm-mapper/mdraid won't really work. At least some fs mounts simply fail with an error. It sounds like it will work for a new fs/md build, but not if adding to something that already exists. The md feature was that if you added a 4k device to an existing md device, then it changed the top device to be 4k, and then filesystem mounts of that device fail because of that size change. On Wed, Oct 8, 2025 at 3:53 AM Barry Scott <[email protected]> wrote: > > > > On 8 Oct 2025, at 09:11, lejeczek via users <[email protected]> > wrote: > > Do you know if any of your Samsung NVMes support 4K? > > > None of mine do, I have 980 and 980 PRO models. > > Do you know that the tooling for partitions and file systems all support 4k > alignment and size? > I'm just curious and have not researched this. > > Barry > > -- > _______________________________________________ > users 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 -- _______________________________________________ users 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
