Created attachment 795965 [details] photo of bootscreen after upgrade to F19 GRUB2 comes up with "error: diskfilter writes are not supported" and waits some seconds to press a key and thanks god boots after that automatically to not break wakeup-on-lan (see also attachment) but what is this nonsense? Personalities : [raid1] [raid10] md2 : active raid10 sda3[0] sdc3[1] sdb3[3] sdd3[2] 3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 2/29 pages [8KB], 65536KB chunk md1 : active raid10 sda2[0] sdc2[1] sdb2[3] sdd2[2] 30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 0/1 pages [0KB], 65536KB chunk md0 : active raid1 sda1[0] sdc1[1] sdd1[2] sdb1[3] 511988 blocks super 1.0 [4/4] [UUUU] unused devices: <none> _________________________________________________ [root@rh:~]$ 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 ### 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 set timeout=1 ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Fedora, with Linux 3.10.11-200.fc19.x86_64' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.10.11-200.fc19.x86_64-advanced-b935b5db-0051-4f7f-83ac-6a6651fe0988' { savedefault load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod part_msdos insmod part_msdos insmod part_msdos insmod diskfilter insmod mdraid1x insmod ext2 set root='mduuid/1d691642baed26df1d1974964fb00ff8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint='mduuid/1d691642baed26df1d1974964fb00ff8' 1de836e4-e97c-43ee-b65c-400b0c29d3aa else search --no-floppy --fs-uuid --set=root 1de836e4-e97c-43ee-b65c-400b0c29d3aa fi linux /vmlinuz-3.10.11-200.fc19.x86_64 root=UUID=b935b5db-0051-4f7f-83ac-6a6651fe0988 ro divider=10 audit=0 rd.plymouth=0 plymouth.enable=0 rd.md.uuid=b7475879:c95d9a47:c5043c02:0c5ae720 rd.md.uuid=1d691642:baed26df:1d197496:4fb00ff8 rd.md.uuid=ea253255:cb915401:f32794ad:ce0fe396 rd.luks=0 rd.lvm=0 rd.dm=0 elevator=deadline selinux=0 net.ifnames=0 biosdevname=0 clocksource=hpet noisapnp noresume nf_conntrack.acct=1 printk.time=0 nmi_watchdog=0 pcie_aspm=force i915.i915_enable_rc6=7 i915.i915_enable_fbc=1 i915.lvds_downclock=1 consoleblank=0 acpi_osi=Linux vconsole.font=latarcyrheb-sun16 vconsole.keymap=de-latin1-nodeadkeys locale.LANG=de_DE.UTF-8 initrd /initramfs-3.10.11-200.fc19.x86_64.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 ###
oh, and remove the line "insmod diskfilter" from "grub.cfg" does not change anything
I'm seeing the same error. I found the message mysterious, so I took a look at the code and discovered the following: - "diskfilter" is GRUB's implementation detail for working with LVM and MD RAID devices. - Writing to these kinds of devices is not implemented in GRUB. - The error may have always been there, but 0085-grub-core-disk-diskfilter.c-grub_diskfilter_write-Ca.patch made it more visible. - The reason GRUB is trying to write to the device could be it's following the "save_env" commands in the config file.
interesting - why does GRUB try to write anything? it has not to touch any FS at boot GRUB2 is such a large step backwards because it is more or less it's own operating system with the most ugly configuration one could design while grub-legacy was a boot-manager and nothing else finally we end in 3 full operating systems * grub * dracut * linux
/etc/default/grub with these options avoids a lot of crap on Fedora-Only machines GRUB_TIMEOUT=1 GRUB_DISTRIBUTOR="Fedora" GRUB_SAVEDEFAULT="false" GRUB_TERMINAL_OUTPUT="console" GRUB_DISABLE_RECOVERY="true" GRUB_DISABLE_SUBMENU="true" GRUB_DISABLE_OS_PROBER="true"
Note that GRUB Legacy had a similar feature: the "savedefault" command.
but it did not halt boot for some seconds with a useless error message and "press any key to continue" as well it did not mess up with submenues and whatever nor did it freeze the machine while edit the kernel line which happens with GRUB2 way too often if you need to edit it
My comment #5 was just to show that the assertion "it has not to touch any FS at boot" is false and that GRUB Legacy was no different in this regard. I already commented on the increased visibility of the error, in comment #2.
For Fedora 20 in /etc/default/grub GRUB_SAVEDEFAULT="false" makes the difference (after grub2-mkconfig)
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Reopening, this issue occurs on a new installation of Fedora 39 with /boot on a RAID 1 device. https://askubuntu.com/questions/468466/diskfilter-writes-are-not-supported-what-triggers-this-error/498281#498281 and https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1274320 indicate this problem is related to LVM/RAID. $ df -hP /boot Filesystem Size Used Avail Use% Mounted on /dev/md125 2.0G 250M 1.6G 14% /boot $ cat /proc/mdstat Personalities : [raid10] [raid1] [raid6] [raid5] [raid4] md125 : active raid1 sdc2[2] sdb2[1] sdd2[3] sda3[0] 2094080 blocks super 1.2 [4/4] [UUUU] bitmap: 0/1 pages [0KB], 65536KB chunk There is also a patch proposed at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=754921
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