Hello,
I am running CentOS from a btrfs root.
This worked fine until I added a device to that pool:
btrfs device add /dev/sda3 /
reboot
This now causes the errors:
BTRFS: failed to read chunk tree on sdb3
BTRFS: open_ctree failed
Here I am stuck in a recovery prompt.
btrfs fi show displays the file system correctly with 2.1GiB used for
sdb3 and 0.00GiB used on sda3
btrfs-tools version reports
btrfs-progs v4.3.1
Now, I read that in case of this issue, should add the second device of
the pool to the commandline argument of the kernel/the boot options/grub.cfg
But I am not sure how to do this.
I can mount /boot/ and the /boot/grub2/grub.cfg contains:
insmod ext2 (but not btrfs!)
set root='hd0,msdos1'
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1
--hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'
4a470ac6-f013-4e7b-a4f3-3a58cc4debc3
after removing sda3 from the pool again, the system boots normally.
blkid gives:
/dev/sdb3: LABEL="rockstor_rockstor"
UUID="f9de7c11-012e-4e5d-8b53-0e6d6c2916a3"
UUID_SUB="24bdf07b-dbd3-44dc-9195-4b0bfedf974f" TYPE="btrfs"
PARTLABEL="Linux filesystem" PARTUUID="c438bd3c-df9a-4e49-8607-47cd9b45e212"
(note /dev/sda3 is not shown here)
btrfs fi show
Label: 'rockstor_rockstor' uuid: f9de7c11-012e-4e5d-8b53-0e6d6c2916a3
Total devices 1 FS bytes used 1.38GiB
devid 1 size 6.87GiB used 2.10GiB path /dev/sdb3
It's a pitty that the only NAS Distribution built around btrfs does not
support the full feature-set of btrfs on its root partition.
Could you please help me fixing this?
Below you find the complete grub.cfg.
Regards,
Hendrik
cat /boot/grub2/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
set pager=1
if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="${saved_entry}"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
terminal_output console
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=5
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/00_tuned ###
set tuned_params=""
### END /etc/grub.d/00_tuned ###
### BEGIN /etc/grub.d/01_users ###
if [ -f ${prefix}/user.cfg ]; then
source ${prefix}/user.cfg
if [ -n "${GRUB2_PASSWORD}" ]; then
set superusers="root"
export superusers
password_pbkdf2 root ${GRUB2_PASSWORD}
fi
fi
### END /etc/grub.d/01_users ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Rockstor (4.3.3-1.el7.elrepo.x86_64) 3 (Core)' --class rhel
fedora --class gnu-linux --class gnu --class os --unrestricted
$menuentry_id_option
'gnulinux-4.3.3-1.el7.elrepo.x86_64-advanced-f9de7c11-012e-4e5d-8b53-0e6d6c2916a3'
{
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1
--hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'
4a470ac6-f013-4e7b-a4f3-3a58cc4debc3
else
search --no-floppy --fs-uuid --set=root
4a470ac6-f013-4e7b-a4f3-3a58cc4debc3
fi
linux16 /vmlinuz-4.3.3-1.el7.elrepo.x86_64
root=UUID=f9de7c11-012e-4e5d-8b53-0e6d6c2916a3 ro rootflags=subvol=root
crashkernel=auto rhgb quiet LANG=en_US.UTF-8
initrd16 /initramfs-4.3.3-1.el7.elrepo.x86_64.img
}
menuentry 'Rockstor (0-rescue-f5f625480f394bdc90d6d3c06be7fb88) 3
(Core)' --class rhel fedora --class gnu-linux --class gnu --class os
--unrestricted $menuentry_id_option
'gnulinux-0-rescue-f5f625480f394bdc90d6d3c06be7fb88-advanced-f9de7c11-012e-4e5d-8b53-0e6d6c2916a3'
{
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root
--hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1
--hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'
4a470ac6-f013-4e7b-a4f3-3a58cc4debc3
else
search --no-floppy --fs-uuid --set=root
4a470ac6-f013-4e7b-a4f3-3a58cc4debc3
fi
linux16 /vmlinuz-0-rescue-f5f625480f394bdc90d6d3c06be7fb88
root=UUID=f9de7c11-012e-4e5d-8b53-0e6d6c2916a3 ro rootflags=subvol=root
crashkernel=auto rhgb quiet
initrd16 /initramfs-0-rescue-f5f625480f394bdc90d6d3c06be7fb88.img
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_ppc_terminfo ###
### END /etc/grub.d/20_ppc_terminfo ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply
type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
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