Hi, can you check the latest 21.10 (Impish) packages and let us know if 4.2-rc1 or rc2 resolve this issue?
** Changed in: mdadm (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894846 Title: Mdadm allows to create raid with size smaller than 1 MiB. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1894846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs