On Fri, 31 Jul 2020 14:30:14 +0100 Steve McIntyre <st...@einval.com> wrote:
> I'm guessing - do you have multiple disks on your system? If so, try > "grub-install <disk>" on each of the bootable disks and that should > fix your problem. As I mentioned, mount /dev/sda5 /mnt grub-install --boot-directory=/mnt /dev/sda has fixed the problem for me. fdisk -l reports :- Disk /dev/sda: 223.6 GiB, 240057409536 bytes, 468862128 sectors Disk model: Corsair Force GS 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: dos Disk identifier: 0xc1920bad Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT /dev/sda2 210942 468860927 468649986 223.5G 5 Extended /dev/sda5 210944 722943 512000 250M 83 Linux /dev/sda6 724992 468860927 468135936 223.2G 8e Linux LVM Disk /dev/sdb: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors Disk model: WDC WD10EZRX-00A 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: dos Disk identifier: 0xc1920ba9 Device Boot Start End Sectors Size Id Type /dev/sdb1 * 2048 209717247 209715200 100G 7 HPFS/NTFS/exFAT /dev/sdb2 209721342 1953523711 1743802370 831.5G 5 Extended /dev/sdb5 209721344 230201343 20480000 9.8G 82 Linux swap / Solaris /dev/sdb6 230203392 1953523711 1723320320 821.8G 8e Linux LVM Partition 2 does not start on physical sector boundary. And then there is a list of partitions handled by LVM (many for Xen) but including :- Disk /dev/mapper/SSD0-root: 20 GiB, 21474836480 bytes, 41943040 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/HDD0-var: 9.3 GiB, 9999220736 bytes, 19529728 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/mapper/SSD0-home: 38.6 GiB, 41473277952 bytes, 81002496 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Geoff