I feel this is a stupid question.I have an encrypted Arch setup (without LVM) were a single disk (sdc) contains an unencrypted boot partition and the encrypted root partition.Below the output of lsblk:NAME          MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINTsda             8:0    0   1.4T  0 disk  sda1          8:1    0   1.4T  0 part  sdb             8:16   1   3.8G  0 disk  sdb1          8:17   1   3.8G  0 part  sdc             8:32   0 238.5G  0 disk  sdc1          8:33   0    64M  0 part  /bootsdc2          8:34   0 238.4G  0 part    cryptroot 254:0    0 238.4G  0 crypt /sdd             8:48   0  83.9G  0 disk  sdd1          8:49   0   100M  0 part  sdd2          8:50   0  83.8G  0 part  sde             8:64   0 930.8G  0 disk  sde1          8:65   0 930.8G  0 part  sr0            11:0    1  1024M  0 rom   Everything works fine as long as I have a USB drive plugged in (it may even be empty), however when I unplug the USB drive (sdb in the dump above), grub reports that /sdc2 is not a LUKS container (not the exact message but the gist of it).What I believe that when the USB drive is disconnected, the device containing my arch installation becomes sdb (every id is shifted one?)GRUB_DEFAULT=0GRUB_TIMEOUT=2GRUB_DISTRIBUTOR=ArchGRUB_CMDLINE_LINUX_DEFAULT=quietGRUB_CMDLINE_LINUX=cryptdevice=/dev/sdc2:cryptroot# Preload both GPT and MBR modules so that they are not missedGRUB_PRELOAD_MODULES=part_gpt part_msdos# Uncomment to enable Hidden Menu, and optionally hide the timeout count#GRUB_HIDDEN_TIMEOUT=5#GRUB_HIDDEN_TIMEOUT_QUIET=true# Uncomment to use basic consoleGRUB_TERMINAL_INPUT=console# Uncomment to disable graphical terminal#GRUB_TERMINAL_OUTPUT=console# The resolution used on graphical terminal# note that you can use only modes which your graphic card supports via VBE# you can see them in real GRUB with the command `vbeinfo'GRUB_GFXMODE=auto# Uncomment to allow the kernel use the same resolution used by grubGRUB_GFXPAYLOAD_LINUX=keep# Uncomment if you want GRUB to pass to the Linux kernel the old parameter# format root=/dev/xxx instead of root=/dev/disk/by-uuid/xxx#GRUB_DISABLE_LINUX_UUID=true# Uncomment to disable generation of recovery mode menu entriesGRUB_DISABLE_RECOVERY=true# Uncomment and set to the desired menu colors.  Used by normal and wallpaper# modes only.  Entries specified as foreground/background.#GRUB_COLOR_NORMAL=light-blue/black#GRUB_COLOR_HIGHLIGHT=light-cyan/blue# Uncomment one of them for the gfx desired, a image background or a gfxtheme#GRUB_BACKGROUND=/path/to/wallpaper#GRUB_THEME=/path/to/gfxtheme# Uncomment to get a beep at GRUB start#GRUB_INIT_TUNE=480 440 1#GRUB_SAVEDEFAULT=trueGRUB_DISABLE_SUBMENU=yI also triedGRUB_CMDLINE_LINUX=cryptdevice=UUID=fb9a6cc1-592f-46ca-9d26-ccaa6a3d4ea9:cryptrootBut with the same problems (below is the output of blkid)/dev/sda1: LABEL=Ny diskenhed UUID=589299B7929999D8 TYPE=ntfs PARTUUID=a450f178-01/dev/sdb1: LABEL=ARCH_201508 UUID=C83D-1650 TYPE=vfat PARTUUID=0005b309-01/dev/sdc2: UUID=fb9a6cc1-592f-46ca-9d26-ccaa6a3d4ea9 TYPE=crypto_LUKS PARTUUID=0fc4f1e5-02/dev/sdd1: LABEL=Reserveret til systemet UUID=0220B61820B612A1 TYPE=ntfs PARTUUID=cde3ca74-01/dev/sdd2: UUID=A0B8B723B8B6F73E TYPE=ntfs PARTUUID=cde3ca74-02/dev/sde1: LABEL=Helium UUID=6E32E1EF32E1BC69 TYPE=ntfs PARTUUID=fad27ece-01I followed this guide for setting up Arch on LUKSHow can I fix this?
Grub cryptdevice with changing device names?
linux;arch linux;grub;luks;disk encryption