Re: Destroyed Entries at /dev/sda - boot not possible anymore

[Andrei Borzenkov]

On Tue, Mar 31, 2015 at 1:24 PM, Stefan Lamby <address@hidden> wrote:
> address@hidden:~# mount -r /dev/sda1 /mnt
> address@hidden:~# ls -lR /mnt
> /mnt:
> total 4
> drwxr-xr-x 3 root root 4096 Feb 21 18:40 EFI
>
> /mnt/EFI:
> total 4
> drwxr-xr-x 2 root root 4096 Feb 21 18:40 ubuntu
>
> /mnt/EFI/ubuntu:
> total 3416
> -rwxr-xr-x 1 root root     126 Mar 29 18:19 grub.cfg
> -rwxr-xr-x 1 root root  956792 Mar 29 18:19 grubx64.efi
> -rwxr-xr-x 1 root root 1178240 Mar 29 18:19 MokManager.efi
> -rwxr-xr-x 1 root root 1355736 Mar 29 18:19 shimx64.efi
> address@hidden:~# umount /mnt
> address@hidden:~# mount -r /dev/sdb1 /mnt
> address@hidden:~# ls -lR /mnt
> /mnt:
> total 0
> address@hidden:~# blkid
> /dev/loop0: TYPE="squashfs"
> /dev/sda1: UUID="7514-B7B3" TYPE="vfat"
> /dev/sda2: UUID="708071fb-bf40-4e1e-99fe-d82213fd7364" TYPE="ext2"
> /dev/sda3: UUID="6118b2b9-788b-409f-ba00-baaff583a397" TYPE="crypto_LUKS"

So it appears your original installation using encrypted partition, right?

> /dev/sr0: LABEL="Kubuntu 14.04.2 LTS amd64" TYPE="iso9660"
> /dev/sdb1: UUID="71BB-0AB6" TYPE="vfat"
> /dev/sdb2: UUID="751b32b1-3302-4a2a-92f4-f3941ea8c3f3" TYPE="ext4"
> /dev/sdb3: UUID="d18c3e0d-53dc-4b02-8b79-747fa732c3d7" TYPE="swap"
>
> I dont know why but for some reason I am not able to boot from usb any more.

For some reasons /dev/sdb1 is empty.

Just to be sure, could you please paste content of
/EFI/ubuntu/grub.cfg on /dev/sda1? Also detailed information about
partitions 1 on each disk:

gdisk /dev/sda
i
q

gdisk /dev/sdb
i
q

(i should ask partition number, enter 1).