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grub2-probe confused by double bind mount?
From: |
Chris Murphy |
Subject: |
grub2-probe confused by double bind mount? |
Date: |
Thu, 3 Aug 2017 01:24:23 -0600 |
Running grub2-mkconfig complains with
grub2-probe: error: cannot find a device for / (is /dev mounted?).
/dev is mounted and looks valid. If I point grub2-probe to / I get the
same error, whereas if I point it to the /dev device mounted to it, it
exits normally.
I suspect grub2-probe is confused due to double bind mounting, but I
can't directly prove it.
The problem only happens when / is built first by mounting with '-o
subvol=root' (Btrfs subvolume) and also ostree. If I drop one of
those, the problem doesn't happen. But in combination, the problem
does happen.
On line 1 (in details below), the Btrfs subvol command is implemented
behind the scenes as a bind mount.
On line 14 is --rbind of /mnt/sysimage elsewhere, required for ostree assembly.
Details of mounting process, and output from grub2-probe:
pretty version
https://paste.fedoraproject.org/paste/YFWQW33yBHkLcyzIzL4XuQ
likely clobbered by the MUA version:
# mount -t btrfs -o subvol=root /dev/sda7 /mnt/sysimage
# mount -t ext4 -o defaults /dev/sda5 /mnt/sysimage/boot
# mount -t hfsplus -o defaults /dev/sda4 /mnt/sysimage/boot/efi
# mount -t bind -o bind,defaults /dev /mnt/sysimage/dev
# mount -t devpts -o gid=5,mode=620 devpts /mnt/sysimage/dev/pts
# mount -t tmpfs -o defaults tmpfs /mnt/sysimage/dev/shm
# mount -t proc -o defaults proc /mnt/sysimage/proc
# mount -t bind -o bind,defaults /run /mnt/sysimage/run
# mount -t sysfs -o defaults sysfs /mnt/sysimage/sys
# mount -t efivarfs -o defaults efivarfs /mnt/sysimage/sys/firmware/efi/efivars
# mount -t selinuxfs -o defaults selinuxfs /mnt/sysimage/sys/fs/selinux
# mount --bind
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/usr
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/usr
# mount --bind -o remount,ro
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/usr
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/usr
# mount --rbind /mnt/sysimage
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/sysroot
# mount --rbind /mnt/sysimage/boot
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/boot
# mount --rbind /mnt/sysimage/ostree/deploy/fedora-workstation/var
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/var
# mount --rbind /mnt/sysimage/dev
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/dev
# mount --rbind /mnt/sysimage/proc
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/proc
# mount --rbind /mnt/sysimage/run
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/run
# mount --rbind /mnt/sysimage/sys
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/sys
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/home
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/roothome
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/lib/rpm
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/opt
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/srv
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/usrlocal
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/mnt
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/media
# systemd-tmpfiles --create --boot
--root=/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0
--prefix=/var/spool/mail
# chroot
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/
# ls -l /dev
total 0
crw-------. 1 root root 10, 235 Aug 3 2017 autofs
drwxr-xr-x. 2 root root 440 Aug 2 21:23 block
drwxr-xr-x. 2 root root 120 Aug 2 21:23 bsg
crw-rw----. 1 root disk 10, 234 Aug 3 2017 btrfs-control
drwxr-xr-x. 3 root root 60 Aug 2 21:22 bus
lrwxrwxrwx. 1 root root 3 Aug 3 2017 cdrom -> sr0
drwxr-xr-x. 2 root root 4720 Aug 2 21:23 char
crw-------. 1 root root 5, 1 Aug 2 21:23 console
lrwxrwxrwx. 1 root root 11 Aug 2 21:22 core -> /proc/kcore
drwxr-xr-x. 10 root root 220 Aug 2 21:22 cpu
crw-------. 1 root root 10, 62 Aug 3 2017 cpu_dma_latency
crw-------. 1 root root 10, 203 Aug 2 21:22 cuse
drwxr-xr-x. 8 root root 160 Aug 2 21:22 disk
brw-rw----. 1 root disk 253, 0 Aug 3 2017 dm-0
brw-rw----. 1 root disk 253, 1 Aug 3 2017 dm-1
drwxr-xr-x. 3 root root 140 Aug 3 2017 dri
crw-------. 1 root root 240, 0 Aug 3 2017 drm_dp_aux0
crw-------. 1 root root 240, 1 Aug 3 2017 drm_dp_aux1
crw-------. 1 root root 240, 2 Aug 3 2017 drm_dp_aux2
crw-------. 1 root root 240, 3 Aug 3 2017 drm_dp_aux3
crw-rw----. 1 root video 29, 0 Aug 3 2017 fb0
crw-rw----. 1 root video 29, 1 Aug 3 2017 fb1
lrwxrwxrwx. 1 root root 13 Aug 2 21:22 fd -> /proc/self/fd
crw-rw-rw-. 1 root root 1, 7 Aug 3 2017 full
crw-rw-rw-. 1 root root 10, 229 Aug 3 2017 fuse
crw-------. 1 root root 243, 0 Aug 3 2017 fw0
crw-------. 1 root root 254, 0 Aug 3 2017 gpiochip0
crw-------. 1 root root 246, 1 Aug 3 2017 hidraw1
crw-------. 1 root root 246, 2 Aug 3 2017 hidraw2
crw-------. 1 root root 246, 3 Aug 3 2017 hidraw3
crw-------. 1 root root 10, 228 Aug 3 2017 hpet
drwxr-xr-x. 2 root root 40 Aug 3 2017 hugepages
crw-------. 1 root root 10, 183 Aug 3 2017 hwrng
crw-------. 1 root root 241, 0 Aug 3 2017 iio:device0
lrwxrwxrwx. 1 root root 25 Aug 3 2017 initctl ->
/run/systemd/initctl/fifo
drwxr-xr-x. 4 root root 440 Aug 3 2017 input
crw-------. 1 root root 238, 0 Aug 3 2017 kfd
crw-r--r--. 1 root root 1, 11 Aug 3 2017 kmsg
crw-rw-rw-+ 1 root kvm 10, 232 Aug 3 2017 kvm
lrwxrwxrwx. 1 root root 28 Aug 2 21:22 log ->
/run/systemd/journal/dev-log
brw-rw----. 1 root disk 7, 0 Aug 3 2017 loop0
brw-rw----. 1 root disk 7, 1 Aug 3 2017 loop1
brw-rw----. 1 root disk 7, 2 Aug 3 2017 loop2
crw-rw----. 1 root disk 10, 237 Aug 3 2017 loop-control
crw-rw----. 1 root lp 6, 0 Aug 3 2017 lp0
crw-rw----. 1 root lp 6, 1 Aug 3 2017 lp1
crw-rw----. 1 root lp 6, 2 Aug 3 2017 lp2
crw-rw----. 1 root lp 6, 3 Aug 3 2017 lp3
drwxr-xr-x. 2 root root 100 Aug 2 21:22 mapper
crw-------. 1 root root 10, 227 Aug 3 2017 mcelog
crw-rw----. 1 root video 239, 0 Aug 3 2017 media0
crw-------. 1 root root 242, 0 Aug 3 2017 mei0
crw-r-----. 1 root kmem 1, 1 Aug 3 2017 mem
crw-------. 1 root root 10, 59 Aug 3 2017 memory_bandwidth
drwxr-xr-x. 2 root root 40 Aug 3 2017 mqueue
drwxr-xr-x. 2 root root 60 Aug 2 21:22 net
crw-------. 1 root root 10, 61 Aug 3 2017 network_latency
crw-------. 1 root root 10, 60 Aug 3 2017 network_throughput
crw-rw-rw-. 1 root root 1, 3 Aug 3 2017 null
crw-------. 1 root root 10, 144 Aug 3 2017 nvram
crw-r-----. 1 root kmem 1, 4 Aug 3 2017 port
crw-------. 1 root root 108, 0 Aug 3 2017 ppp
crw-rw-rw-. 1 root tty 5, 2 Aug 3 00:27 ptmx
drwxr-xr-x. 2 root root 0 Aug 3 00:03 pts
crw-rw-rw-. 1 root root 1, 8 Aug 3 2017 random
drwxr-xr-x. 2 root root 60 Aug 2 21:22 raw
crw-rw-r--+ 1 root root 10, 58 Aug 3 2017 rfkill
lrwxrwxrwx. 1 root root 4 Aug 3 2017 rtc -> rtc0
crw-------. 1 root root 250, 0 Aug 3 2017 rtc0
brw-rw----. 1 root disk 8, 0 Aug 3 2017 sda
brw-rw----. 1 root disk 8, 1 Aug 3 2017 sda1
brw-rw----. 1 root disk 8, 2 Aug 3 2017 sda2
brw-rw----. 1 root disk 8, 3 Aug 3 2017 sda3
brw-rw----. 1 root disk 8, 4 Aug 3 2017 sda4
brw-rw----. 1 root disk 8, 5 Aug 3 2017 sda5
brw-rw----. 1 root disk 8, 6 Aug 3 2017 sda6
brw-rw----. 1 root disk 8, 7 Aug 3 2017 sda7
brw-rw----. 1 root disk 8, 16 Aug 3 2017 sdb
brw-rw----. 1 root disk 8, 17 Aug 3 2017 sdb1
brw-rw----. 1 root disk 8, 18 Aug 3 2017 sdb2
brw-rw----. 1 root disk 8, 19 Aug 3 2017 sdb3
brw-rw----. 1 root disk 8, 32 Aug 2 21:23 sdc
brw-rw----. 1 root disk 8, 33 Aug 2 21:23 sdc1
crw-rw----. 1 root disk 21, 0 Aug 3 2017 sg0
crw-rw----+ 1 root cdrom 21, 1 Aug 3 2017 sg1
crw-rw----. 1 root disk 21, 2 Aug 3 2017 sg2
crw-rw----. 1 root disk 21, 3 Aug 2 21:23 sg3
drwxrwxrwt. 2 root root 40 Aug 3 00:03 shm
crw-------. 1 root root 10, 231 Aug 3 2017 snapshot
drwxr-xr-x. 3 root root 280 Aug 3 2017 snd
brw-rw----+ 1 root cdrom 11, 0 Aug 3 2017 sr0
lrwxrwxrwx. 1 root root 15 Aug 2 21:22 stderr -> /proc/self/fd/2
lrwxrwxrwx. 1 root root 15 Aug 2 21:22 stdin -> /proc/self/fd/0
lrwxrwxrwx. 1 root root 15 Aug 2 21:22 stdout -> /proc/self/fd/1
crw-rw-rw-. 1 root tty 5, 0 Aug 3 2017 tty
crw--w----. 1 root tty 4, 0 Aug 3 2017 tty0
crw--w----. 1 gdm tty 4, 1 Aug 3 2017 tty1
crw--w----. 1 root tty 4, 10 Aug 3 2017 tty10
crw--w----. 1 root tty 4, 11 Aug 3 2017 tty11
crw--w----. 1 root tty 4, 12 Aug 3 2017 tty12
crw--w----. 1 root tty 4, 13 Aug 3 2017 tty13
crw--w----. 1 root tty 4, 14 Aug 3 2017 tty14
crw--w----. 1 root tty 4, 15 Aug 3 2017 tty15
crw--w----. 1 root tty 4, 16 Aug 3 2017 tty16
crw--w----. 1 root tty 4, 17 Aug 3 2017 tty17
crw--w----. 1 root tty 4, 18 Aug 3 2017 tty18
crw--w----. 1 root tty 4, 19 Aug 3 2017 tty19
crw--w----. 1 chris tty 4, 2 Aug 3 2017 tty2
crw--w----. 1 root tty 4, 20 Aug 3 2017 tty20
crw--w----. 1 root tty 4, 21 Aug 3 2017 tty21
crw--w----. 1 root tty 4, 22 Aug 3 2017 tty22
crw--w----. 1 root tty 4, 23 Aug 3 2017 tty23
crw--w----. 1 root tty 4, 24 Aug 3 2017 tty24
crw--w----. 1 root tty 4, 25 Aug 3 2017 tty25
crw--w----. 1 root tty 4, 26 Aug 3 2017 tty26
crw--w----. 1 root tty 4, 27 Aug 3 2017 tty27
crw--w----. 1 root tty 4, 28 Aug 3 2017 tty28
crw--w----. 1 root tty 4, 29 Aug 3 2017 tty29
crw--w----. 1 root tty 4, 3 Aug 3 2017 tty3
crw--w----. 1 root tty 4, 30 Aug 3 2017 tty30
crw--w----. 1 root tty 4, 31 Aug 3 2017 tty31
crw--w----. 1 root tty 4, 32 Aug 3 2017 tty32
crw--w----. 1 root tty 4, 33 Aug 3 2017 tty33
crw--w----. 1 root tty 4, 34 Aug 3 2017 tty34
crw--w----. 1 root tty 4, 35 Aug 3 2017 tty35
crw--w----. 1 root tty 4, 36 Aug 3 2017 tty36
crw--w----. 1 root tty 4, 37 Aug 3 2017 tty37
crw--w----. 1 root tty 4, 38 Aug 3 2017 tty38
crw--w----. 1 root tty 4, 39 Aug 3 2017 tty39
crw--w----. 1 root tty 4, 4 Aug 3 2017 tty4
crw--w----. 1 root tty 4, 40 Aug 3 2017 tty40
crw--w----. 1 root tty 4, 41 Aug 3 2017 tty41
crw--w----. 1 root tty 4, 42 Aug 3 2017 tty42
crw--w----. 1 root tty 4, 43 Aug 3 2017 tty43
crw--w----. 1 root tty 4, 44 Aug 3 2017 tty44
crw--w----. 1 root tty 4, 45 Aug 3 2017 tty45
crw--w----. 1 root tty 4, 46 Aug 3 2017 tty46
crw--w----. 1 root tty 4, 47 Aug 3 2017 tty47
crw--w----. 1 root tty 4, 48 Aug 3 2017 tty48
crw--w----. 1 root tty 4, 49 Aug 3 2017 tty49
crw--w----. 1 root tty 4, 5 Aug 3 2017 tty5
crw--w----. 1 root tty 4, 50 Aug 3 2017 tty50
crw--w----. 1 root tty 4, 51 Aug 3 2017 tty51
crw--w----. 1 root tty 4, 52 Aug 3 2017 tty52
crw--w----. 1 root tty 4, 53 Aug 3 2017 tty53
crw--w----. 1 root tty 4, 54 Aug 3 2017 tty54
crw--w----. 1 root tty 4, 55 Aug 3 2017 tty55
crw--w----. 1 root tty 4, 56 Aug 3 2017 tty56
crw--w----. 1 root tty 4, 57 Aug 3 2017 tty57
crw--w----. 1 root tty 4, 58 Aug 3 2017 tty58
crw--w----. 1 root tty 4, 59 Aug 3 2017 tty59
crw--w----. 1 root tty 4, 6 Aug 3 2017 tty6
crw--w----. 1 root tty 4, 60 Aug 3 2017 tty60
crw--w----. 1 root tty 4, 61 Aug 3 2017 tty61
crw--w----. 1 root tty 4, 62 Aug 3 2017 tty62
crw--w----. 1 root tty 4, 63 Aug 3 2017 tty63
crw--w----. 1 root tty 4, 7 Aug 3 2017 tty7
crw--w----. 1 root tty 4, 8 Aug 3 2017 tty8
crw--w----. 1 root tty 4, 9 Aug 3 2017 tty9
crw-rw----. 1 root dialout 4, 64 Aug 3 2017 ttyS0
crw-rw----. 1 root dialout 4, 65 Aug 3 2017 ttyS1
crw-rw----. 1 root dialout 4, 74 Aug 3 2017 ttyS10
crw-rw----. 1 root dialout 4, 75 Aug 3 2017 ttyS11
crw-rw----. 1 root dialout 4, 76 Aug 3 2017 ttyS12
crw-rw----. 1 root dialout 4, 77 Aug 3 2017 ttyS13
crw-rw----. 1 root dialout 4, 78 Aug 3 2017 ttyS14
crw-rw----. 1 root dialout 4, 79 Aug 3 2017 ttyS15
crw-rw----. 1 root dialout 4, 80 Aug 3 2017 ttyS16
crw-rw----. 1 root dialout 4, 81 Aug 3 2017 ttyS17
crw-rw----. 1 root dialout 4, 82 Aug 3 2017 ttyS18
crw-rw----. 1 root dialout 4, 83 Aug 3 2017 ttyS19
crw-rw----. 1 root dialout 4, 66 Aug 3 2017 ttyS2
crw-rw----. 1 root dialout 4, 84 Aug 3 2017 ttyS20
crw-rw----. 1 root dialout 4, 85 Aug 3 2017 ttyS21
crw-rw----. 1 root dialout 4, 86 Aug 3 2017 ttyS22
crw-rw----. 1 root dialout 4, 87 Aug 3 2017 ttyS23
crw-rw----. 1 root dialout 4, 88 Aug 3 2017 ttyS24
crw-rw----. 1 root dialout 4, 89 Aug 3 2017 ttyS25
crw-rw----. 1 root dialout 4, 90 Aug 3 2017 ttyS26
crw-rw----. 1 root dialout 4, 91 Aug 3 2017 ttyS27
crw-rw----. 1 root dialout 4, 92 Aug 3 2017 ttyS28
crw-rw----. 1 root dialout 4, 93 Aug 3 2017 ttyS29
crw-rw----. 1 root dialout 4, 67 Aug 3 2017 ttyS3
crw-rw----. 1 root dialout 4, 94 Aug 3 2017 ttyS30
crw-rw----. 1 root dialout 4, 95 Aug 3 2017 ttyS31
crw-rw----. 1 root dialout 4, 68 Aug 3 2017 ttyS4
crw-rw----. 1 root dialout 4, 69 Aug 3 2017 ttyS5
crw-rw----. 1 root dialout 4, 70 Aug 3 2017 ttyS6
crw-rw----. 1 root dialout 4, 71 Aug 3 2017 ttyS7
crw-rw----. 1 root dialout 4, 72 Aug 3 2017 ttyS8
crw-rw----. 1 root dialout 4, 73 Aug 3 2017 ttyS9
crw-------. 1 root root 10, 239 Aug 2 21:22 uhid
crw-------. 1 root root 10, 223 Aug 3 2017 uinput
crw-rw-rw-. 1 root root 1, 9 Aug 3 2017 urandom
drwxr-xr-x. 2 root root 60 Aug 2 21:22 usb
crw-------. 1 root root 247, 0 Aug 3 2017 usbmon0
crw-------. 1 root root 247, 1 Aug 3 2017 usbmon1
crw-------. 1 root root 247, 2 Aug 3 2017 usbmon2
crw-------. 1 root root 247, 3 Aug 3 2017 usbmon3
crw-------. 1 root root 247, 4 Aug 3 2017 usbmon4
drwxr-xr-x. 4 root root 80 Aug 3 2017 v4l
crw-rw----. 1 root tty 7, 0 Aug 3 2017 vcs
crw-rw----. 1 root tty 7, 1 Aug 3 2017 vcs1
crw-rw----. 1 root tty 7, 2 Aug 3 2017 vcs2
crw-rw----. 1 root tty 7, 3 Aug 3 2017 vcs3
crw-rw----. 1 root tty 7, 4 Aug 3 2017 vcs4
crw-rw----. 1 root tty 7, 5 Aug 3 2017 vcs5
crw-rw----. 1 root tty 7, 6 Aug 3 2017 vcs6
crw-rw----. 1 root tty 7, 128 Aug 3 2017 vcsa
crw-rw----. 1 root tty 7, 129 Aug 3 2017 vcsa1
crw-rw----. 1 root tty 7, 130 Aug 3 2017 vcsa2
crw-rw----. 1 root tty 7, 131 Aug 3 2017 vcsa3
crw-rw----. 1 root tty 7, 132 Aug 3 2017 vcsa4
crw-rw----. 1 root tty 7, 133 Aug 3 2017 vcsa5
crw-rw----. 1 root tty 7, 134 Aug 3 2017 vcsa6
drwxr-xr-x. 2 root root 60 Aug 3 2017 vfio
crw-------. 1 root root 10, 63 Aug 3 2017 vga_arbiter
crw-------. 1 root root 10, 137 Aug 3 2017 vhci
crw-------. 1 root root 10, 238 Aug 3 2017 vhost-net
crw-------. 1 root root 10, 241 Aug 3 2017 vhost-vsock
crw-rw----+ 1 root video 81, 0 Aug 3 2017 video0
crw-rw-rw-. 1 root root 1, 5 Aug 3 2017 zero
# grub2-probe /
grub2-probe: error: cannot find a device for / (is /dev mounted?).
# grub2-probe -v /
grub2-probe: info: cannot open ‘/boot/grub2/device.map’: No such file
or directory.
grub2-probe: info: changing current directory to /dev.
grub2-probe: info: changing current directory to v4l.
grub2-probe: info: changing current directory to by-path.
grub2-probe: info: changing current directory to by-id.
grub2-probe: info: changing current directory to dri.
grub2-probe: info: changing current directory to by-path.
grub2-probe: info: changing current directory to snd.
grub2-probe: info: changing current directory to by-path.
grub2-probe: info: changing current directory to vfio.
grub2-probe: info: changing current directory to mqueue.
grub2-probe: info: changing current directory to hugepages.
grub2-probe: info: changing current directory to disk.
grub2-probe: info: changing current directory to by-uuid.
grub2-probe: info: changing current directory to by-partlabel.
grub2-probe: info: changing current directory to by-label.
grub2-probe: info: changing current directory to by-partuuid.
grub2-probe: info: changing current directory to by-path.
grub2-probe: info: changing current directory to by-id.
grub2-probe: info: changing current directory to block.
grub2-probe: info: changing current directory to usb.
grub2-probe: info: changing current directory to char.
grub2-probe: info: changing current directory to net.
grub2-probe: info: changing current directory to pts.
grub2-probe: info: changing current directory to shm.
grub2-probe: info: changing current directory to bsg.
grub2-probe: info: changing current directory to mapper.
grub2-probe: info: changing current directory to input.
grub2-probe: info: changing current directory to by-path.
grub2-probe: info: changing current directory to by-id.
grub2-probe: info: changing current directory to bus.
grub2-probe: info: changing current directory to usb.
grub2-probe: info: changing current directory to 004.
grub2-probe: info: changing current directory to 003.
grub2-probe: info: changing current directory to 002.
grub2-probe: info: changing current directory to 001.
grub2-probe: info: changing current directory to raw.
grub2-probe: info: changing current directory to cpu.
grub2-probe: info: changing current directory to 7.
grub2-probe: info: changing current directory to 6.
grub2-probe: info: changing current directory to 5.
grub2-probe: info: changing current directory to 4.
grub2-probe: info: changing current directory to 3.
grub2-probe: info: changing current directory to 2.
grub2-probe: info: changing current directory to 1.
grub2-probe: info: changing current directory to 0.
grub2-probe: error: cannot find a device for / (is /dev mounted?).
#
# grub2-probe -v --device /dev/sda7
grub2-probe: info: cannot open ‘/boot/grub2/device.map’: No such file
or directory.
grub2-probe: info: /dev/sda7 is not present.
grub2-probe: info: Looking for /dev/sda7.
grub2-probe: info: /dev/sda is a parent of /dev/sda7.
grub2-probe: info: /dev/sda7 starts from 264892416.
grub2-probe: info: opening the device hostdisk//dev/sda.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Partition 0 starts from 40.
grub2-probe: info: Partition 1 starts from 409640.
grub2-probe: info: Partition 2 starts from 244750664.
grub2-probe: info: Partition 3 starts from 246022144.
grub2-probe: info: Partition 4 starts from 246431744.
grub2-probe: info: Partition 5 starts from 248528896.
grub2-probe: info: Partition 6 starts from 264892416.
grub2-probe: info: /dev/sda7 is present.
grub2-probe: info: Looking for /dev/sda7.
grub2-probe: info: /dev/sda is a parent of /dev/sda7.
grub2-probe: info: /dev/sda7 starts from 264892416.
grub2-probe: info: opening the device hostdisk//dev/sda.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Partition 0 starts from 40.
grub2-probe: info: Partition 1 starts from 409640.
grub2-probe: info: Partition 2 starts from 244750664.
grub2-probe: info: Partition 3 starts from 246022144.
grub2-probe: info: Partition 4 starts from 246431744.
grub2-probe: info: Partition 5 starts from 248528896.
grub2-probe: info: Partition 6 starts from 264892416.
grub2-probe: info: /dev/sda7 is present.
grub2-probe: info: Looking for /dev/sda7.
grub2-probe: info: /dev/sda is a parent of /dev/sda7.
grub2-probe: info: /dev/sda7 starts from 264892416.
grub2-probe: info: opening the device hostdisk//dev/sda.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Scanning for DISKFILTER devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid1x devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09 devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for mdraid09_be devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for dmraid_nv devices on disk hostdisk//dev/sda.
grub2-probe: info: Scanning for ldm devices on disk hostdisk//dev/sda.
grub2-probe: info: scanning hostdisk//dev/sda for LDM.
grub2-probe: info: no LDM signature found.
grub2-probe: info: Scanning for lvm devices on disk hostdisk//dev/sda.
grub2-probe: info: no LVM signature found.
grub2-probe: info: Partition 0 starts from 40.
grub2-probe: info: Partition 1 starts from 409640.
grub2-probe: info: Partition 2 starts from 244750664.
grub2-probe: info: Partition 3 starts from 246022144.
grub2-probe: info: Partition 4 starts from 246431744.
grub2-probe: info: Partition 5 starts from 248528896.
grub2-probe: info: Partition 6 starts from 264892416.
grub2-probe: info: opening hostdisk//dev/sda,gpt7.
grub2-probe: info: drive = 0.
grub2-probe: info: the size of hostdisk//dev/sda is 488397168.
btrfs
#
Also curious, this sequence while in the chroot (up until exiting)
# grub2-probe ostree
btrfs
# grub2-probe sysroot
btrfs
]# grub2-probe usr
btrfs
# grub2-probe var
btrfs
# grub2-probe etc
grub2-probe: error: cannot find a device for etc (is /dev mounted?).
# exit
# grub2-probe
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/
btrfs
# chroot
/mnt/sysimage/ostree/deploy/fedora-workstation/deploy/e52f5de4c5d3f52211ab216d5bf5331b81c929e967f9cbfcba3ad85e45f8fd37.0/
# grub2-probe /
grub2-probe: error: cannot find a device for / (is /dev mounted?).
--
Chris Murphy
- grub2-probe confused by double bind mount?,
Chris Murphy <=