Recovering an Arch Linux partition with grub rescue: How to do it?

claudiogc · 2015-07-01 02:34:01

Goog evening!

I have in my system Arch Linux and Windows7 and in another partition, a backup partition. So, i tried to reinstall both systems and
i got a problem with it. You can see my real problem here: https://bbs.archlinux.org/viewtopic.php?id=199215

I'm not getting help with it so i decided try another thing. I would like to recover my Arch Linux partition because when i turn
on my notebook i automatically enter in "grub rescue" mode.
Here what i get when i enter with "ls" command:

grub rescue> ls
(hd0) (hd0,msdos5) (hd0, msdos1)
grub rescue> ls (hd0)
(hd0): Filesystem is unknown
grub rescue> ls (hd0,msdos5)
(hd0,mdsos5): Filesystem is unknown
grub rescue> ls (hd0,msdos1)
(hd0,mdsos1): Filesystem is unknown

Here, my paritions:

Windows7 Boot partition -> sda1
Windows 7 system -> sda2 (NTFS)
Backup partition -> sda5 (NTFS)
Arch Linux -> sda6 (ext4)
Swap -> sda7

I have no idea where is my Arch partition and what to do now.

Please, guys, i have a lot of important files in my backup partition and i really need to recover them.

How can i recover my Arch parition considering that "ls" output?

jasonwryan · 2015-07-01 02:42:05

What does "recover" mean? Chroot in and see what the issue is; don't rely on Grub's rescue mode.

Not an Installation issue, moving to NC...

claudiogc · 2015-07-01 02:52:05

jasonwryan wrote:

What does "recover" mean? Chroot in and see what the issue is; don't rely on Grub's rescue mode.
Not an Installation issue, moving to NC...

Sorry my english! I want access my files again and to do that i would like to restore my Arch Linux.

ewaller · 2015-07-01 03:53:32

Let's see if your data are safe. Boot from your Arch Linux install media and mount your /dev/sda6 on /mnt. I gather that you installed all of arch to that one volume, including /home and /boot.
From the console, after you mount /dev/sda6, look at the structure under /dev/sda6. Is that your Arch Installation?

Were there errors when you tried to mount it? If so, what (explicitly) were the error messages?

claudiogc · 2015-07-01 13:13:49

ewaller wrote:

Let's see if your data are safe. Boot from your Arch Linux install media and mount your /dev/sda6 on /mnt. I gather that you installed all of arch to that one volume, including /home and /boot.
From the console, after you mount /dev/sda6, look at the structure under /dev/sda6. Is that your Arch Installation?
Were there errors when you tried to mount it? If so, what (explicitly) were the error messages?

But, dude, as i said, i cannot get access the console from dvd. When i put my dvd in the drive, look the what happens:

triggering uevents ...after a while...
worker [67] /devices/pci0000:00/0000:00:11.0/ata1/host0/target0:0:0/0:0:0:0/block/sda/sda16 is taking a long time
...same message here but changing worker[89] number and sda23 number...
...same message here and changing again and again...

Thats why i asked how can i restore Arch Linux system using "grub rescue" because that's all i can use. I don't know if "grub rescue" are inside hd, if yes, thats a good start, i think.

Trilby · 2015-07-01 13:26:39

claudiogc wrote:

But, dude, as i said

As English is not your first language I suspect this is unintentional, but for future reference, the word "dude" is very informal - and using it like this with someone you don't know personally can be seen as rude.

Can you try a bootable usb flash drive? It looks like something is wrong with that CD, but booting a live system still seems the best approach to me.

ewaller · 2015-07-01 13:56:03

I re-read your first post, and I am afraid I still do not see where you assert that you cannot boot from a CD/DVD.
If you find yourself in a grub shell, I am fairly certain you booted from the hard drive.

Are you telling me that there is no way for you to boot your installation optical media? That would indicate a hardware or media problem.
Are you able to boot from USB as Trilby asked?

shulamy · 2015-07-01 14:10:38

may be he means to use super grub disk to boot if the problem is the bootloader.

ezik

claudiogc · 2015-07-05 19:36:00

Trilby wrote:

As English is not your first language I suspect this is unintentional, but for future reference, the word "dude" is very informal - and using it like this with someone you don't know personally can be seen as rude.

I'm sorry, i didn't know that!

Trilby wrote:

Can you try a bootable usb flash drive? It looks like something is wrong with that CD, but booting a live system still seems the best approach to me.

I'm sorry for taking so long to respond, was quite busy these last days.
So, i installed Arch linux in a flash drive using rufus, following this tutorial:
https://wiki.archlinux.org/index.php/US … tion_media

And here is the output:

starting version 221
running hook [udev]
triggering uevents...
[ 5.929275] sd 8:0:0:0: [sdb] No Caching mode page found
[ 5.929363] sd 8:0:0:0: [sdb] Assuming drive cache: write through
running hook [memdisk]
running hook [archiso]
running hook [archiso_loop_mnt]
running hook [archiso_pxe_common]
running hook [archiso_pxe_nbd]
running hook [archiso_pxe_http]
running hook [archiso_pxe_nfs]
Mounting '/dev/disk/by-label/ARCH_201507' to '/run/archiso/bootmnt'
Waiting 30 seconds for device /dev/disk/by-label/ARCH_201507 ...
ERROR: '/dev/disk/by-label/ARCH_201507' device did not show up after 30 seconds...
Falling back to interactive promt
You can try to fix the problem manually, log out when are finished
sh: can't access tty: job control turned off
[rootfs/]# here i can enter commands, but don't know what to do

Head_on_a_Stick · 2015-07-05 19:42:44

From Windows, insert the USB stick and check it's drive letter then run:

g:
label

(The above presume that the drive letter is "g:")

This will show the label of the USB stick.

If it is not called "ARCH_201507" then use this to change the label:

label g: ARCH_201507

If the label is correct, try booting it again a few times -- I have seen this problem intermittently on my laptop when attempting to boot the Arch live ISO.

claudiogc · 2015-07-06 02:03:40

Head_on_a_Stick wrote:

From Windows, insert the USB stick and check it's drive letter then run:
g:
label
(The above presume that the drive letter is "g:")
This will show the label of the USB stick.
If it is not called "ARCH_201507" then use this to change the label:
label g: ARCH_201507
If the label is correct, try booting it again a few times -- I have seen this problem intermittently on my laptop when attempting to boot the Arch live ISO.

But, can't i do what i want from "[rootfs/]# "

Head_on_a_Stick · 2015-07-06 07:05:41

claudiogc wrote:

can't i do what i want from "[rootfs/]# "

Can you run `e2label` & `lsblk` from the emergency prompt?

If not, then no...

You could examine and change the label from a GNU/Linux live ISO if you wanted, it just seems easier to do it from Windows.

At any rate, I think you should just try booting it a few more times -- as I said, I have seen that error intermittently when attempting to boot the Arch live ISO.

Arch Linux

#1 2015-07-01 02:34:01

Recovering an Arch Linux partition with grub rescue: How to do it?

#2 2015-07-01 02:42:05

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#3 2015-07-01 02:52:05

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#4 2015-07-01 03:53:32

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#5 2015-07-01 13:13:49

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#6 2015-07-01 13:26:39

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#7 2015-07-01 13:56:03

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#8 2015-07-01 14:10:38

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#9 2015-07-05 19:36:00

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#10 2015-07-05 19:42:44

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#11 2015-07-06 02:03:40

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

#12 2015-07-06 07:05:41

Re: Recovering an Arch Linux partition with grub rescue: How to do it?

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