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always use UUIDs in grub

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Pig Monkey 2017-01-21 16:33:55 -08:00
parent d20b9c53a3
commit ffaab2efbb
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13
INSTALL.md
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@ -10,6 +10,10 @@ while only /boot/efi is left unecrypted.
Use your system's setup interface to choose UEFI or legacy/BIOS mode as appropriate.
Note that this guide assumes you are performing the install to `/dev/sda`. In
some cases, you may find that your USB install disk claimed `/dev/sda` and you
want to install to `/dev/sdb`. Confirm which disk is which before proceeding.
On some newer systems (e.g. Dell XPS 15), set SATA operation mode to AHCI.
Boot into the Arch installer.
@ -120,15 +124,16 @@ Configure GRUB.
$ echo GRUB_ENABLE_CRYPTODISK=y >> /etc/default/grub
# BIOS mode
$ sed -i 's/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX="cryptdevice=\/dev\/sda1:lvm:allow-discards resume=\/dev\/mapper\/arch-swap"/' /etc/default/grub
# BIOS mode - set the UUID of the encrpyted root device
$ ROOTUUID=$(blkid /dev/sda1 | awk '{print $2}' | cut -d '"' -f2)
$ sed -i "s/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX=\"cryptdevice=UUID="$ROOTUUID":lvm:allow-discards resume=\/dev\/mapper\/arch-swap\"/" /etc/default/grub
$ grub-mkconfig -o /boot/grub/grub.cfg
$ grub-install /dev/sda
$ chmod -R g-rwx,o-rwx /boot
# UEFI mode - set the UUID of the encrpyted root device
# e.g. blkid /dev/sda3 | awk '{print $3}'
$ sed -i 's/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX="cryptdevice=UUID=<your-rootdevice-UID>:lvm:allow-discards root=\/dev\/mapper\/arch-root resume=\/dev\/mapper\/arch-swap"/' /etc/default/grub
$ ROOTUUID=$(blkid /dev/sda3 | awk '{print $2}' | cut -d '"' -f2)
$ sed -i "s/^GRUB_CMDLINE_LINUX=.*/GRUB_CMDLINE_LINUX=\"cryptdevice=UUID="$ROOTUUID":lvm:allow-discards root=\/dev\/mapper\/arch-root resume=\/dev\/mapper\/arch-swap\"/" /etc/default/grub
$ grub-mkconfig -o /boot/grub/grub.cfg
$ grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=grub --recheck
$ chmod -R g-rwx,o-rwx /boot