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dpaddy
Apprentice
Joined: 25 Jun 2008
Posts: 176
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 Posted: Mon Mar 17, 2025 1:02 am Post subject: [SOLVED] disk (following gentoo handbook) will not boot |
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I have two systems: old and new. I have two disks: old and new. Both disks boot right fine on the old system. Only the old disk will boot on the new system. My plan (unless I receive wiser advice) is to make another disk -- call it a good disk (good because it should boot on the new system) -- that will be like the old disk but has contents which are essentially the same as the new disk (I have sweated blood getting the new disk to boot into a functioning gentoo environment on the old system and will go insane if I have to replicate that work all over again).
I am currently booted on the new system with the old disk | Code: | $ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 5.5T 0 disk
├─sda1 8:1 0 2G 0 part
├─sda2 8:2 0 64G 0 part
└─sda3 8:3 0 5.4T 0 part
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 8M 0 part
├─sdb2 8:18 0 1018M 0 part
├─sdb3 8:19 0 32G 0 part [SWAP]
└─sdb4 8:20 0 898.5G 0 part / |
The old disk is sdb and the new disk is sda. I presume that the old gentoo system is essentially on sdb4 and the new gentoo system is essentially on sda3.
fdisk reports | Code: | Disk /dev/sda: 5.47 TiB, 6001175126016 bytes, 11721045168 sectors
Disk model: ST6000NM019B-2TG
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 19DF9733-89BD-4F0D-AF35-4D12206D2703
Device Start End Sectors Size Type
/dev/sda1 2048 4196351 4194304 2G EFI System
/dev/sda2 4196352 138414079 134217728 64G Linux swap
/dev/sda3 138414080 11721043967 11582629888 5.4T Linux root (x86-64)
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and | Code: | Disk /dev/sdb: 931.53 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: WDC WD1005FBYZ-0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: AF2E0A39-C07A-48AD-B126-4B6C73CE2F1D
Device Start End Sectors Size Type
/dev/sdb1 2048 18431 16384 8M BIOS boot
/dev/sdb2 18432 2103295 2084864 1018M EFI System
/dev/sdb3 2103296 69212159 67108864 32G Linux filesystem
/dev/sdb4 69212160 1953523119 1884310960 898.5G Linux filesystem
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So I suppose I need to format the good disk -- call it sdc -- to have partitions like sdb. Partition sdc3 will be swap just like sdb3 and sdc4 will be / just like sdb4. I am uncertain of the precise mechanics to format sdc, and how to "initialize" sdc1 and sdc2 so that booting the good disk works like booting the old disk. Moreover, I don't know exactly how to copy sda3 to sdc4 in a manner such that everything magically works without blood sweat and tears.
fstab (remember I've booted with sdb on the new sysrtem) is | Code: | UUID="5562-2CBD" /boot vfat noauto,noatime 1 2
UUID="a5c0888d-d3b5-4896-9222-74357a093da8" none swap sw 0 0
UUID="76be16bb-33e0-4e4e-b42c-063cc7dca9bd" / ext4 noatime 0 1
UUID="5f4ced57-9b19-400d-abfe-bd4548ff67fb" /mnt/tmp ext4 noauto,user 0 0
UUID="e7f8bc6f-91e7-44e5-bac8-a3fd2a43bd1c" /mnt/raid ext4 noauto,user 0 0
LABEL=scratch /mnt/scratch ext4 noauto,user 0 0
/dev/cdrom /mnt/cdrom auto noauto,user 0 0
/dev/sde1 /mnt/usb vfat noauto,user 0 0
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Everything on /mnt/... is not going to be part of the new system. I don't perfectly understand what | Code: | | UUID="5562-2CBD" /boot vfat noauto,noatime 1 2 |
is about because I thought /boot was somehow involved in the boot process but | Code: | # mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=8225695,mode=755)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
/dev/sdb4 on / type ext4 (rw,noatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
cgroup_root on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755)
openrc on /sys/fs/cgroup/openrc type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/lib/rc/sh/cgroup-release-agent.sh,name=openrc)
none on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cpuset on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cpu on /sys/fs/cgroup/cpu type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)
cpuacct on /sys/fs/cgroup/cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct)
freezer on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=6588576k,mode=700,uid=1000,gid=1000) |
and | Code: | # ls -al /boot
total 8
drwxr-xr-x 2 root root 4096 Jun 24 2020 .
drwxr-xr-x 20 root root 4096 Mar 8 08:48 ..
-rw-r--r-- 1 root root 0 Jun 24 2020 .keep |
which tells me (or so I think) that /boot is empty which seems strange given that sdb boots. Perhaps something about sdb1 and sdb2 provides an initramfs. In any case I want to have the contents of /boot actually living on sdc4 rather than it residing elsewhere requiring mounting something to mount point /boot.
It needs to be appreciated that I am a master at totally fucking things up, I don't have a proper understanding of genttoo, and I need painfully explicit and complete details if I am to have any chance of fixing things.
Is there a gentoo ninja who will hand-hold me through this? I'ld sincerely appreciate it.
EDIT: After getting much needed sleep it occurred to me that the above is likely a fever dream -- an absolutely insane idea. I need to focus on getting the new disk to boot in the new system. I replaced the battery on the new system's motherboard, reloaded uefi defaults in the bios, and tried to boot the new disk. Now I get | Quote: | GRUB loading.
Welcome to GRUB!
error: unknown file system.
Entering rescue mode...
grub rescue > |
At this point I will try to understand https://forums.gentoo.org/viewtopic-t-1161648-highlight-grub+error+unknown+system.html and will update this post with whatever issues/progress I make.
Last edited by dpaddy on Mon Mar 17, 2025 2:58 pm; edited 1 time in total |
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dpaddy
Apprentice
Joined: 25 Jun 2008
Posts: 176
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| Posted: Mon Mar 17, 2025 2:31 pm Post subject: |
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I tried to reinstall grub following the handbook | Code: | livecd ~ # mkdir --parents /mnt/gentoo
livecd ~ # mount /dev/sda3 /mnt/gentoo
livecd ~ # mkdir --parents /mnt/gentoo/efi
livecd ~ # cd /mnt/gentoo
livecd /mnt/gentoo # mount --types proc /proc /mnt/gentoo/proc
livecd /mnt/gentoo # mount --rbind /sys /mnt/gentoo/sys
livecd /mnt/gentoo # mount --make-rslave /mnt/gentoo/sys
livecd /mnt/gentoo # mount --rbind /dev /mnt/gentoo/dev
livecd /mnt/gentoo # mount --make-rslave /mnt/gentoo/dev
livecd /mnt/gentoo # mount --bind /run /mnt/gentoo/run
livecd /mnt/gentoo # mount --make-slave /mnt/gentoo/run
livecd /mnt/gentoo # chroot /mnt/gentoo /bin/bash
livecd / # source /etc/profile
livecd / # export PS1="(chroot) ${PS1}"
(chroot) livecd / # mount /dev/sda1 /efi
(chroot) livecd / # cat /etc/portage/package.use/installkernel
sys-kernel/installkernel dracut grub
(chroot) livecd / # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 679M 1 loop
sda 8:0 0 5.5T 0 disk
├─sda1 8:1 0 2G 0 part /efi
├─sda2 8:2 0 64G 0 part [SWAP]
└─sda3 8:3 0 5.4T 0 part /
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 8M 0 part
├─sdb2 8:18 0 1018M 0 part
├─sdb3 8:19 0 32G 0 part
└─sdb4 8:20 0 898.5G 0 part
sdc 8:32 1 3.7G 0 disk
├─sdc1 8:33 1 250K 0 part
├─sdc2 8:34 1 2.8M 0 part
├─sdc3 8:35 1 776.8M 0 part
└─sdc4 8:36 1 300K 0 part
(chroot) livecd / # blkid
/dev/sdc3: BLOCK_SIZE="2048" LABEL="Gentoo-amd64-20250309" TYPE="hfsplus" PARTLABEL="HFSPLUS" PARTUUID="ea97a0db-3884-430a-8935-ef74c9855b19"
/dev/sdb4: UUID="76be16bb-33e0-4e4e-b42c-063cc7dca9bd" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="rootfs" PARTUUID="da2d0284-7b90-48c8-898b-2dae328f7b1f"
/dev/sdb2: UUID="5562-2CBD" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="boot" PARTUUID="545a06c5-3154-4328-b267-808d36cb8540"
/dev/sdb3: UUID="a5c0888d-d3b5-4896-9222-74357a093da8" TYPE="swap" PARTLABEL="swap" PARTUUID="426c0ada-439e-46f9-b68b-f905934ade32"
/dev/sdb1: PARTLABEL="grub" PARTUUID="e45c8972-7179-4e6c-bb28-6e2266963ac0"
/dev/loop0: BLOCK_SIZE="131072" TYPE="squashfs"
/dev/sdc2: SEC_TYPE="msdos" UUID="30ED-476B" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="EFI boot partition" PARTUUID="ea97a0db-3884-430a-8934-ef74c9855b19"
/dev/sdc1: PARTLABEL="Gap0" PARTUUID="ea97a0db-3884-430a-8937-ef74c9855b19"
/dev/sdc4: PARTLABEL="Gap1" PARTUUID="ea97a0db-3884-430a-8932-ef74c9855b19"
/dev/sda2: UUID="e3960c50-67dc-44cb-b718-0f16a2d1edb0" TYPE="swap" PARTUUID="fa9bc050-84bd-472d-951a-db1d637681cc"
/dev/sda3: UUID="4ecf4ba4-ea4a-408a-9a02-6974e1e78498" BLOCK_SIZE="4096" TYPE="xfs" PARTUUID="93c124f2-769a-405e-97df-84fff4674735"
/dev/sda1: UUID="45A7-64AA" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="b3caa0e9-1073-4486-846d-95f8de7b7115"
(chroot) livecd / # cat /etc/fstab
UUID="45A7-64AA" /efi vfat umask=0077 0 2
UUID="e3960c50-67dc-44cb-b718-0f16a2d1edb0" none swap sw 0 0
UUID="4ecf4ba4-ea4a-408a-9a02-6974e1e78498" / xfs defaults,noatime 0 1
/dev/cdrom /mnt/cdrom auto noauto,noatime,user 0 0
(chroot) livecd / # cat /etc/portage/make.conf
# These settings were set by the catalyst build script that automatically
# built this stage.
# Please consult /usr/share/portage/config/make.conf.example for a more
# detailed example.
COMMON_FLAGS="-march=native -O2 -pipe"
CFLAGS="${COMMON_FLAGS}"
CXXFLAGS="${COMMON_FLAGS}"
FCFLAGS="${COMMON_FLAGS}"
FFLAGS="${COMMON_FLAGS}"
RUSTFLAGS="${RUSTFLAGS} -C target-cpu=native"
CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3"
MAKEOPTS='-j16'
GRUB_PLATFORMS="efi-64"
# NOTE: This stage was built with the bindist USE flag enabled
USE="X elogind"
VIDEO_CARDS="nouveau"
# INPUT_DEVICES="libinput"
ACCEPT_LICENSE="-* @FREE @BINARY-REDISTRIBUTABLE"
# This sets the language of build output to English.
# Please keep this setting intact when reporting bugs.
LC_MESSAGES=C.utf8
(chroot) livecd / # emerge -vp sys-boot/grub
These are the packages that would be merged, in order:
Calculating dependencies... done!
Dependency resolution took 1.73 s (backtrack: 0/20).
[ebuild R ] sys-boot/grub-2.12-r5:2/2.12-r5::gentoo USE="device-mapper fonts nls themes -doc -efiemu -libzfs -mount -sdl -secureboot (-test) -truetype -verify-sig" GRUB_PLATFORMS="efi-64 -coreboot -efi-32 -emu -ieee1275 (-loongson) -multiboot -pc -qemu (-qemu-mips) -uboot -xen -xen-32 -xen-pvh" 0 KiB
Total: 1 package (1 reinstall), Size of downloads: 0 KiB
* IMPORTANT: 19 news items need reading for repository 'gentoo'.
* Use eselect news read to view new items. |
I emerged grub (again) with success. Perhaps the use flags should be different but I could not find what they should be in the handbook. | Code: | (chroot) livecd / # grub-install --efi-directory=/efi
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
(chroot) livecd / # grub-install --target=x86_64-efi --efi-directory=/efi
Installing for x86_64-efi platform.
EFI variables are not supported on this system.
EFI variables are not supported on this system.
grub-install: error: efibootmgr failed to register the boot entry: No such file or directory.
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I will reboot and check that CSM mode is disabled in the BIOS. Perhaps that will allow grub-install... I'll post the results.
EDIT: After disabling CSM, booting the Minimal installation CD from usb and then chroot, now grub-install works as described in the handbook and my new disk boots in the new system 
I have serious problems with emacs not working (except when using -nw) but that is for a different post. |
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