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--- linux:filesystems:boot [2013/04/09 22:12]
tkilla
+++ linux:filesystems:boot [2022/11/06 21:39] (current)
tkilla
@@ Line 26: / Line 26: @@
-. **gparted** - no ext4, only from livesystems
+. **parted** - no ext4, only from livesystems
 etc...
@@ Line 56: / Line 56: @@
 **generate a new (/mnt/newsys) /boot/grub/grub.cfg**:
   update-grub
+In case of error "no such disc" run
+  grub-mkdevicemap
 **Install to the MBR (no partition number) of the new disc, finally:**
@@ Line 118: / Line 122: @@
   grub-install /dev/sdX
+===== Bugs =====
+Inside a chroot, grub complains
+  # update-grub
+  Generating grub configuration file ...
+  WARNING: Device /dev/ram0 not initialized in udev database even after waiting 10000000 microseconds.
+  ...
+Fix:
+Outside chroot /debian/:
+  mkdir /debian/run/udev
+  mount --bind /run/udev /debian/run/udev
+  mount --bind /run/udev /mnt/run/udev
+===== Crypto Bugs =====
+Grub complains root device couldn't be found
+Fix:
+- set
+  GRUB_ENABLE_CRYPTODISK=y
+  apt install cryptsetup-initramfs lvm2
+- if it is a brtfs, set in /etc/initramfs/modules
+  btrfs
+Commands to execute in chroot to reinstall grub:
+  update-initramfs -c -k all
+  grub-install /dev/sdX
+  update-grub
+If update-grub echos: "cannot find device for / in fstab" and you have a btrfs rootsys:
+  mount -o "subvol=@" /dev/mapper/vgubuntu-root
+is required to mount the @ subvol!

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