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 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
