Re: Failure to boot after upgrade 14.3->14.4 with "ZFS: unsupported feature: com.klarasystems: vdev_zaps_v2"

Johan Helsingius <[email protected]> Fri, 1 May 2026 08:18:51 +0200

Newsgroups	gmane.os.freebsd.questions
Message-ID	<[email protected]>

On 30/04/2026 9:46 pm, Daniel Tameling wrote:
> Google suggests that your bootloader doesn't support the features of the root partition. Did you perhaps do a "zfs upgrade"? You need to boot from external medium and update the bootloader.
>   Depending on whether you use UEFI or Bios the steps differ.

Thanks - yes, I managed to solve the issue. Booted up on an installer
USB stick, mounted the zfs filesystem, and did an update/upgrade.

	Julf