Hey,
I was recently upgrading Ubuntu from 14.04 to 16.04 and something went wrong so I did a fresh install and now I can't access the content of my backup disk any more since the backup disk LVM config is missing.
I have a 256GB SSD and a 512GB HDD in my system and use the HDD for backups and the SDD for live system and user data. The HDD was originally alone and I had Ubuntu there all with standard encryption setup. I just wiped the contents and used this disk as backup. I didn't had a clue what is really done under the hood to get this LVM/LUKS stuff going until my upgrade.
For the upgrade I removed the HDD so the installer doesn't mess with my backup. I then installed Ubuntu 16.04 by using defaults on the SDD. After reinserting the HDD the system asked my for the LUKS passphrase and that is still working. What is missing is obviously the LVM configuration. I have a backup of this ... on the encrypted disk. :( I didn't know that this required to have a working LVM ...
So I have obviously a hen and egg problem. I already made a 1:1 copy of the disk to an external USB drive so I can mess around with the live data. I tried testdisk on the decrypted disk but didn't get meaningful results. Do I have to somehow restore the LVM config before I can get to the real filesystem?
Any help is welcome.
SDD
SDD
mapper
LVM
/dev/mapper/sda5_crypt is sda because the HDD was not present during setup
HP
I was recently upgrading Ubuntu from 14.04 to 16.04 and something went wrong so I did a fresh install and now I can't access the content of my backup disk any more since the backup disk LVM config is missing.
I have a 256GB SSD and a 512GB HDD in my system and use the HDD for backups and the SDD for live system and user data. The HDD was originally alone and I had Ubuntu there all with standard encryption setup. I just wiped the contents and used this disk as backup. I didn't had a clue what is really done under the hood to get this LVM/LUKS stuff going until my upgrade.
For the upgrade I removed the HDD so the installer doesn't mess with my backup. I then installed Ubuntu 16.04 by using defaults on the SDD. After reinserting the HDD the system asked my for the LUKS passphrase and that is still working. What is missing is obviously the LVM configuration. I have a backup of this ... on the encrypted disk. :( I didn't know that this required to have a working LVM ...
So I have obviously a hen and egg problem. I already made a 1:1 copy of the disk to an external USB drive so I can mess around with the live data. I tried testdisk on the decrypted disk but didn't get meaningful results. Do I have to somehow restore the LVM config before I can get to the real filesystem?
Any help is welcome.
SDD
Code:
~# fdisk -l /dev/sda
Disk /dev/sda: 465,8 GiB, 500107862016 bytes, 976773168 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
Disklabel type: dos
Disk identifier: 0x0005fbe9
Device Boot Start End Sectors Size Id Type
/dev/sda1 63 501757 501695 245M 82 Linux swap / Solaris
/dev/sda2 * 501758 976771071 976269314 465,5G 5 Extended
/dev/sda5 501760 976771071 976269312 465,5G 83 LinuxCode:
~# fdisk -l /dev/sdb
Disk /dev/sdb: 238,5 GiB, 256060514304 bytes, 500118192 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
Disklabel type: dos
Disk identifier: 0xab7c491f
Device Boot Start End Sectors Size Id Type
/dev/sdb1 * 2048 999423 997376 487M 83 Linux
/dev/sdb2 1001470 500117503 499116034 238G 5 Extended
/dev/sdb5 1001472 500117503 499116032 238G 83 LinuxCode:
~# ls -l /dev/dev/mapper/sda5_crypt/mapper/
total 0
crw------- 1 root root 10, 236 Dez 22 20:36 control
lrwxrwxrwx 1 root root 7 Dez 23 11:19 cryptdisk -> ../dm-3
lrwxrwxrwx 1 root root 7 Dez 22 20:36 sda5_crypt -> ../dm-0
lrwxrwxrwx 1 root root 7 Dez 22 20:36 ubuntu--vg-root -> ../dm-1
lrwxrwxrwx 1 root root 7 Dez 22 20:36 ubuntu--vg-swap_1 -> ../dm-2Code:
~# pvdisplay
--- Physical volume ---
PV Name /dev/mapper/sda5_crypt
VG Name ubuntu-vg
PV Size 238,00 GiB / not usable 3,00 MiB
Allocatable yes
PE Size 4,00 MiB
Total PE 60926
Free PE 11
Allocated PE 60915
PV UUID UIKcdK-NWq9-eqEm-bGhf-WgFW-OnX5-WyMksI
~# lvdisplay
--- Logical volume ---
LV Path /dev/ubuntu-vg/root
LV Name root
VG Name ubuntu-vg
LV UUID cJZ3qo-ubxu-dZ4B-1dhP-P5wk-ZJkM-YTid9H
LV Write Access read/write
LV Creation host, time ubuntu, 2016-12-21 10:42:53 +0100
LV Status available
# open 1
LV Size 230,32 GiB
Current LE 58961
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
--- Logical volume ---
LV Path /dev/ubuntu-vg/swap_1
LV Name swap_1
VG Name ubuntu-vg
LV UUID IPwxH6-XFL5-jCdV-HCQ9-ggZi-lram-gxUVaq
LV Write Access read/write
LV Creation host, time ubuntu, 2016-12-21 10:42:53 +0100
LV Status available
# open 2
LV Size 7,63 GiB
Current LE 1954
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:2
~# vgdisplay
--- Volume group ---
VG Name ubuntu-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 237,99 GiB
PE Size 4,00 MiB
Total PE 60926
Alloc PE / Size 60915 / 237,95 GiB
Free PE / Size 11 / 44,00 MiB
VG UUID UT0qEh-z2Ed-5JDD-GwTa-xvaE-nzOe-t4RPiQHP