UEFI question

Hello,

I have a Dell R340 server on which installed a 13.0-RELEASE and then
upgraded to 13.1-RELEASE (through freebsd-update). ZFS is used (raidz2). 

The system has the following partitions: https://gist.github.com/silenius/2defdd5480c5c1bc9ba2ff8940756466
Some things regarding UEFI are not clear to me:
- as you can see in the partition list, the installer created an EFI
partition on all 4 drives, however it looks like only the first one has 
has been populated (an mounted): https://gist.github.com/silenius/1220c953f905d868c1615fd0e7122bbf .. why ?
- if I understand well if my da0 disk dies the system becomes
  unbootable (https://gist.github.com/silenius/51d202053295270eaaeb2c02316165ee).. correct?
- what's the correct way to fix this? should I newfs_msdos on each EFI
  partition and copy /boot/loader.efi as /EFI/BOOT/BOOTX64.EFI? or
  should I use efibootmgr?

Thanks for enlightening me :)

Julien

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Julien Cigar
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