Public bug reported:
Suppose you have some kind of RAID array. You expect disks to burst into
flame, and the machine continue to work.
Without some special effort, grub will insist that exactly one EFI entry
is active for Ubuntu, which is not what we should want. If the disk
fails that has the only boot entry on it, then you don't boot again!
EFI has a boor order built-in. There's no reason to insist on having
exactly one.
Here's a healthy EFI configuration with two disks, each of which can be
used for booting to Ubuntu. Then, we install grub to a third disk.
"grub-install" removes the other two boot entries!
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-====================-============-=======================================================
ii efibootmgr 0.12-4 amd64 Interact with the EFI Boot
Manager
ii grub-common 2.02~beta2-36ubuntu2 amd64 GRand Unified Bootloader
(common files)
ii grub-efi-amd64 2.02~beta2-36ubuntu2 amd64 GRand Unified Bootloader,
version 2 (EFI-AMD64 version)
$ sudo efibootmgr -v
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0001,0000
Boot0000* ubuntu
HD(2,GPT,9cff8ce0-5651-4b27-9ce9-afcef877feaa,0xe8d14800,0xf4000)/File(\EFI\ubuntu\grubx64.efi)
Boot0001* ubuntu
HD(2,GPT,747727cb-581b-42a3-b8d7-9bbf0b3eeff8,0x74612800,0xf4000)/File(\EFI\ubuntu\grubx64.efi)
$ ls -l /dev/disk/by-partuuid/9cff8ce0-5651-4b27-9ce9-afcef877feaa
/dev/disk/by-partuuid/747727cb-581b-42a3-b8d7-9bbf0b3eeff8
lrwxrwxrwx 1 root root 10 Apr 8 10:45
/dev/disk/by-partuuid/747727cb-581b-42a3-b8d7-9bbf0b3eeff8 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Apr 8 10:45
/dev/disk/by-partuuid/9cff8ce0-5651-4b27-9ce9-afcef877feaa -> ../../sda2
#### Here comes the deletion lines! "-B" is delete!
$ sudo umount /boot/efi && sudo mount /dev/sdc2 /boot/efi && sudo grub-install
/dev/sdc2 -v
...
grub-install: info: copying `/boot/grub/x86_64-efi/core.efi' ->
`/boot/efi/EFI/ubuntu/grubx64.efi'.
grub-install: info: Registering with EFI: distributor = `ubuntu', path =
`\EFI\ubuntu\grubx64.efi', ESP at hostdisk//dev/sdc,gpt2.
grub-install: info: executing efibootmgr --version </dev/null >/dev/null.
grub-install: info: executing modprobe -q efivars.
grub-install: info: executing efibootmgr -b 0000 -B.
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0001
Boot0001* ubuntu
grub-install: info: executing efibootmgr -b 0001 -B.
BootCurrent: 0000
Timeout: 5 seconds
No BootOrder is set; firmware will attempt recovery
grub-install: info: executing efibootmgr -c -d /dev/sdc -p 2 -w -L ubuntu -l
\EFI\ubuntu\grubx64.efi.
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0000
Boot0000* ubuntu
Installation finished. No error reported.
$ sudo efibootmgr -v
BootCurrent: 0000
Timeout: 5 seconds
BootOrder: 0000
Boot0000* ubuntu
HD(2,GPT,5e30b533-242f-4aaa-8800-1bdd4e13f44e,0xe8d14800,0xf4000)/File(\EFI\ubuntu\grubx64.efi)
$ ls -l /dev/disk/by-partuuid/5e30b533-242f-4aaa-8800-1bdd4e13f44e
lrwxrwxrwx 1 root root 10 Apr 8 10:45
/dev/disk/by-partuuid/5e30b533-242f-4aaa-8800-1bdd4e13f44e -> ../../sdc2
If you're installing something that has the same name, like "ubuntu", expect
all your prized redundancy to be squashed flat.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: grub-common 2.02~beta2-36ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6
Uname: Linux 4.4.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Apr 8 12:56:54 2016
InstallationDate: Installed on 2014-05-07 (701 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1568050
Title:
grub-install removes other EFI boot entries
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