@grahamperrin those disks were all installed with the FreeBSD ZFS installer, so I didn't intentionally do anything other than click buttons :)

@rtyler thanks. So, no corruption.

FreeBSD bug 262770 – bsdinstall:the efi partition not be format except the first disk.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262770

262770 – bsdinstall:the efi partition not be format except the first disk.

@grahamperrin Very interesting, thanks for the link!

@rtyler future documentation (in the absence of an enhancement to the installer) might be similar to what's quoted at <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255318#c12>:

> … ESP partitions should be mounted as MS-DOS filesystems as /boot/efi, and /boot/loader.efi should be copied to /boot/efi/efi/boot/bootx64.efi if the default setup is used. …

255318 – handbook: Document how to update the bootloader