chroot into system

Question

Update :

Following the advies of slm, I could destroy the RST raid 0 and create a new raid0 using mdadm using the webpage he gave me. I could start the installation but at the step where grub is installed, I still get an error and installation stop.

When I try to do the step of the webpages below, I get an error while using chroot, telling me that the file or directory doesn't exit despite it does.

Do you have any idea how I can fix this ?

Original :

I need to install Mint on my laptop which has a fake raid0. I tried lots of time and always get an error while installing Grub. I checked on the internet and someone found a solution : after installing Mint as usual, I need to chroot into the system installed on raid. The author give the following link to help : https://help.ubuntu.com/community/Grub2/Installing#ChRoot

The fact is that I just can't apply this solution to my computer. I'm stuck at the step 7 where I need to mount the correct partition. When using the partition GUI tools, I can see 4 volumes : the first one has 3 partitions (one efi, one ext4 and one swap). The 3 others volumes seem to be the 3 partitions of the first volume take one by one. Otherwise, it is asked on the link above to use fdisk, blkid.

The fdisk -l command give me the followind information :

Disk /dev/sda: 128.0 GB, 128035676160 bytes

Device Boot       Start         End      Blocks   Id   System
/dev/sda1             1   500130303  250065151+   ee   GPT

Disk /dev/sdb: 128.0 GB, 128035676160 bytes

Disk /dev/sdb doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/mapper/isw_ecbefbijea_Volume1'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/mapper/isw_ecbefbijea_Volume1: 256.1 GB, 256066715648 bytes

Device Boot                           Start        End      Blocks  Id   System
/dev/mapper/isw_ecbefbijea_Volume1p1      1  500130303  250065151+  ee   GPT

Disk /dev/mapper/isw_ecbefbijea_Volume1p1: 537 MB, 537657344 bytes

Disk /dev/mapper/isw_ecbefbijea_Volume1p2: 247.1 GB, 247061020672 bytes

Disk /dev/mapper/isw_ecbefbijea_Volume1p2 doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/mapper/isw_ecbefbijea_Volume1p3'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/mapper/isw_ecbefbijea_Volume1p3: 8467 MB, 8467513344 bytes

Disk /dev/mapper/isw_ecbefbijea_Volume1p3 doesn't contain a valid partition table

Disk /dev/mapper/sdc: 8004 MB, 8004304896 bytes

Device     Boot  Start       End   Blocks  Id  System
/dev/sdc1     *     63  15631244  7815591   b  W95 FAT32

The blkid command give me this :

/dev/mapper/isw_ecbefbijea_Volume1p1: UUID="BF26-91E7" TYPE="vfat"
/dev/mapper/isw_ecbefbijea_Volume1p2: UUID="ac1c5978-7533-46b9-87ac-d28b7b8c5453" TYPE="ext4"
/dev/mapper/isw_ecbefbijea_Volume1p3: UUID="8c12d467-0b8d-48db-ad69-96f7a23b4ca3" TYPE="swap"
/dev/loop0: TYPE="squashfs"
/dev/sda: TYPE="isw_raid_member"
/dev/sdb: TYPE="isw_raid_member"
/dev/sdc1: LABEL="SANDISK" UUID="4208-38E8" TYPE="vfat"

Can someone help me to fix this problem ?

EDIT : This is the parted -l command output :

Backtrace has 8 calls on stack :
8: /lib/x86_linux-linux-gnu/libparted.so.0(ped_assert+0x31) [0x7f3d015404b1]
7: /lib/x86_linux-linux-gnu/libparted.so.0(+0x3f5f6) [0x7f3d015705f6]
6: /lib/x86_linux-linux-gnu/libparted.so.0(ped_disk_new+0x49) [0x7f3d0145f99]
5: parted() [0x406dff]
4: parted() [0x407bda]
3: parted(main+0x154b) [0x4065cb]
2: /lib/x86_linux-linux-gnu/libparted.so.6(__libc_start_main+0xf5) [0x7f3d00d1dec5]
1: parted() [0x406617]

You found a bug in GNU Parted! Here's what you have to do:
....

Answer 1

I could find a way to make the installation worked.

To explain it briefly, you need to create your partition by using mdadm and gdisk. In my situation, both were not installed on my live USB key. One this is done, I create 2 newt gpt partition table on both disk (sda and sdb). Then I start to create partition on sda. The first one I create is an EFI System partiton (ef02) of 500 MB. Then I create 2 linux-raid partitions (fd00) for the file system and for swap partition.

Then I use mdadm to create two raid partitions and then I use gdisk to create partition table on both raid partitions and then create one partition on both.

Then I start the installation and when you can, choose the manual installation. I can't remember if you need to do something here. At the end, the installation must be done but don't restart your computer.

Download boot-repair and start it. This will ask you to type some command into the terminal. At the end, it will say that something wrong has happened and that you need to restart. Let's do this. If everything worked fine, it should work. In my case, I get an error about diskfilter when my laptop starts.