Arch Linux

nevenkitasuno

Member

Registered: 2020-02-04

Posts: 2

[SOLVED] Boot encrypted partition with btrfs: fs type not specified

This error appears at boot time:

mount: /:sysroot: no filesystem type specified

To be specific:

I try to setup dual boot system (windows + arch) using rEFInd boot manager on SSD and HDD, where arch partitions are only sda3 (boot), sda5 (crypto with one btrfs subvolume named "@" for root inside), sdb2 (swap) and sdb3 (crypto with one btrfs subvolume named "@home" for /home inside).
Output of "lsblk -f" is as follows:

NAME          FSTYPE      LABEL           UUID                                 FSAVAIL FSUSE% MOUNTPOINT
loop0         squashfs                                                               0   100% /run/archiso/sfs/airootfs
sda                                                                                           
├─sda1        ntfs        Восстановить    1CA03BF5A03BD44C                                    
├─sda2        swap                        2d69172a-e836-4158-820f-981f37e86d1c                
├─sda3        vfat        arch_boot       AFF1-DD8C                             437.1M    13% /mnt/boot
├─sda4        ntfs                        740241DF0241A6C8                                    
└─sda5        crypto_LUKS                 fc493d25-9a79-439d-a5d7-12ad06719327                
  └─cryptroot btrfs       arch_root_label 0a907569-f6b5-4477-9416-28bae43d5cc9   29.7G     7% /mnt
sdb                                                                                           
├─sdb1                                                                                        
├─sdb2        swap                        d9990e5e-fdd3-467a-ba9e-59ed9326a005                [SWAP]
├─sdb3        crypto_LUKS                 751f9ca2-7de3-4a6e-a3a5-58138f14db66                
│ └─crypthome btrfs       arch_home_label 9dd6995f-9fde-454b-8039-bc9010b5a17e /mnt/home               
└─sdb4        ntfs                        5228AE1128ADF45F                                    
sdc                                                                                           
├─sdc1        vfat        ARCH_202001     A871-DD5D                               6.3G     9% /run/archiso/bootmnt
└─sdc2        vfat                        BE3E-6559                                                                                                                                 

Seems like I already specified all possible filesystem types in fstab, crypttab, refind.conf and refind_linux.conf. Contents of this files and also mkinitcpio.conf attached below.

Fstab:

# /dev/mapper/cryptroot LABEL=arch_root_label
UUID=0a907569-f6b5-4477-9416-28bae43d5cc9	/         	btrfs     	rw,relatime,ssd,space_cache,subvolid=258,subvol=/@,subvol=@	0 0

# /dev/sda3 LABEL=arch_boot
UUID=AFF1-DD8C      	/boot     	vfat      	rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro	0 2

# /dev/mapper/crypthome LABEL=arch_home_label
UUID=9dd6995f-9fde-454b-8039-bc9010b5a17e	/home     	btrfs     	rw,relatime,space_cache,subvolid=257,subvol=/@home,subvol=@home	0 0

# /dev/sdb2
UUID=d9990e5e-fdd3-467a-ba9e-59ed9326a005	none      	swap      	defaults  	0 0

Crypttab:

# Configuration for encrypted block devices.
# See crypttab(5) for details.

# NOTE: Do not list your root (/) partition here, it must be set up
#       beforehand by the initramfs (/etc/mkinitcpio.conf).

# <name>       <device>                                     <password>              <options>
# home         UUID=b8ad5c18-f445-495d-9095-c9ec4f9d2f37    /etc/mypassword1
# data1        /dev/sda3                                    /etc/mypassword2
# data2        /dev/sda5                                    /etc/cryptfs.key
# swap         /dev/sdx4                                    /dev/urandom            swap,cipher=aes-cbc-essiv:sha256,size=256
# vol          /dev/sdb7                                    none
crypthome      UUID=751f9ca2-7de3-4a6e-a3a5-58138f14db66    none                    luks 

refind.conf (only arch entry):

menuentry "Arch Linux" {
    icon     /EFI/refind/icons/os_arch.png
    volume   "Arch Linux"
    loader   /boot/vmlinuz-linux
    initrd   /boot/initramfs-linux.img
    options  "rd.luks.name=fc493d25-9a79-439d-a5d7-12ad06719327=cryptroot root=dev/mapper/cryptroot rw rootflags=subvol=@ initrd=/amd-ucode.img initrd=/initramfs-linux.img add_efi_memmap"
    submenuentry "Boot using fallback initramfs" {
        initrd /boot/initramfs-linux-fallback.img
    }
    submenuentry "Boot to terminal" {
        add_options "systemd.unit=multi-user.target"
    }
    disabled
}

refind_linux.conf

"Boot using default options"  "rd.luks.name=fc493d25-9a79-439d-a5d7-12ad06719327=cryptroot root=dev/mapper/cryptroot rw rootflags=subvol=@ initrd=/amd-ucode.img initrd=/initramfs-linux.img add_efi_memmap"
"Boot with standard options"  "archisobasedir=arch archisolabel=ARCH_202001"
"Boot to single-user mode"    "archisobasedir=arch archisolabel=ARCH_202001 single"
"Boot with minimal options"   "ro root=/dev/mapper/cryptroot"

mkinitcpio.conf

MODULES=()
BINARIES=(/usr/sbin/btrfs)
FILES=()
HOOKS=(base systemd btrfs autodetect keyboard sd-vconsole modconf block sd-encrypt filesystems keyboard fsck)

Last edited by nevenkitasuno (2020-02-05 03:24:41)

zaxmyth

Member

From: Seattle / San Francisco

Registered: 2019-03-25

Posts: 25

Website

Re: [SOLVED] Boot encrypted partition with btrfs: fs type not specified

Is it possible that you need a `/` in front of 'dev' in 'root=dev/mapper/cryptroot' - it's missing in two places:

refind.conf

options  "rd.luks.name=fc493d25-9a79-439d-a5d7-12ad06719327=cryptroot root=dev/mapper/cryptroot rw rootflags=subvol=@ initrd=/amd-ucode.img initrd=/initramfs-linux.img add_efi_memmap"

and

refind_linux.conf

"Boot using default options"  "rd.luks.name=fc493d25-9a79-439d-a5d7-12ad06719327=cryptroot root=dev/mapper/cryptroot rw rootflags=subvol=@ initrd=/amd-ucode.img initrd=/initramfs-linux.img add_efi_memmap"

nevenkitasuno

Member

Registered: 2020-02-04

Posts: 2

Re: [SOLVED] Boot encrypted partition with btrfs: fs type not specified

God, how can people be so attentive? Thank you wery much, it works!

romstor

Member

Registered: 2018-08-18

Posts: 54

Re: [SOLVED] Boot encrypted partition with btrfs: fs type not specified

This is probably unrelated, but is there a reason to have "subvol" parameter twice on root and home in fstab:

subvol=/@,subvol=@