Debian :: Rescue Data From Damaged Lvm?
Apr 16, 2010
I have 6 disks (partitions) combined into one lvm volgroup in my server. The server have been online for a year.
And today, suddenly it hangs. At first, I thought it's caused by network lag, because after a couple minutes the server is responsive again. But then I felt something very wrong. I can't access any file that stored on the lvm.
After some dmesg, fdisk -l and a peek at /etc/lvm/archive/*, I found that one of the partitions used for lvm volgroup is missing. Tried a reboot, and the suspected disk is undetected even in BIOS. Must be caused by bad block on the disk's sector zero or something. I think missing one pv makes the volgroup failed to initiate. So, no volgroup, no logical volume. And I can't access the files on it for sure.
Is there a way I can save/rescue data from other non-damaged disks? I have no luck finding similar situation (and solution) by searching on google.
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Jul 4, 2011
My laptop was damaged a couple of months ago. Just a short drop from the couch, but it was hard enough to make the HD inaccessible. I took it to a local, respected shop but they couldn't save any of the data and simply installed a new HD after consulting me.
I have the old drive and would still like to retrieve the data, if the price is right. What should I ask about when looking for another repair shop?
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Jan 16, 2011
Yesterday, my windows xp died and I can not do anything with that, but I would like to rescue my important files from hdd before format. I open ubuntu trial version from cd but i can not access my hdd. I find my hdd in system->administration->disk utility but I can not go anywhere from there.
When I solve this problem I would like to try ubuntu as my os but i am worried that some programs may not work on it . Like for example my bamboo tablet, fm2010, adobe ilustrator, autocad.
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Jan 15, 2011
I am in the process of recovering data from some damaged hard drives.
I am copying the data to a recovery folder on the safe system disk where it is being sorted.
Some of the data/files I do not want to keep.
I want to delete them.
However the permissions are such that it will not let me.
I need to be root.
I don't really want to flaff about in the 1980's geek terminal environment ... just want to right click and select delete.
Is there any way within the GUI to be as one with Root, all powerful, all seeing ......
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Feb 21, 2011
following problem. A friend phoned me in despair. Her Ubuntu didn't start any more - ASUS-Laptop switched on stops at a ramfs-prompt.
I started Puppy-Linux from DVD-Drive. Worked fine. But puppy can't mount her /dev/sda1 partition either. At least you can see that the partition is still there. Fsck stops with an error. May be the initial problem is a sort of bad hardware by which bad bytes were written to the hard drive. Hard drive and/or memory could be replaced but not the data.
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Dec 20, 2010
Has someone tried to rescue windows data from a troubled hard disk using gddrescue from a linux LIVE and would like to explain his experience?
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Dec 2, 2010
I just managed to the one thing I wasn't supposed to do. I managed to mix up my drives and install Ubuntu on the wrong drive. I realized it seconds after starting the partitioning step but too late. It never started copying data but the new partitions are there. Is there any way of getting my data back. It's many photos aso that I don't have a backup of.
I don't want to "fsck" things up even more so I figured I'd ask if anyone has managed to recover from this.
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May 6, 2010
I am not able to detect my USB hard drive in Linux rescue mode after passing "fdisk -l" as i want to take the data backup in my USB hard disk.
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Feb 26, 2011
I just installed natty. I use Deja dup to backup my photos to the server in my basement, but now I can't find them. I really cant understand why theyre gone, but they are, maybe because I'm unorganized. Anyways, my hard drive may not be totally overwritten. Can i rescue my old data, or at least parts of it? How?
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Oct 13, 2015
I pulled the MicroSD card out of a non-working Android phone to backup its data onto my Debian system. My Desktop is Cinnamon and I was simply using copy/past from within Nemo. The files began to be transferred but during the transaction a dialog popped up declaring an input/output error. From that point on the card was not readable on my system.
I initially plugged the card into the computer via a USB card reader. I later tried using an SD card adapter and plugging it in my printer's SD slot. Still the system would not recognize the card. I also tried plugging the card into another Android phone. The phone could not read the card and attaching the phone to a computer did not recognize the card either. I then logged into a Windows 7 system but it could not detect it. The partition manager always showed the USB drive or SD slot as "device not connected". The last thing I tried was putting the card, with the SD adapter, in my camcorder. The camcorder prompted to format but failed to do so.
I would like to recover the pictures and videos off of the card but I am afraid that there may have been hardware failure on the card's controller. I have been searching around most of the day trying to find a solution but nothing I have tried has rendered it detectable on any system. If it is controller failure, need repairing or recovering data from physically damaged SD cards?
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Apr 4, 2011
Adding several 2TB HDDs somehow crashed SATA controller on motherboard.Fedora will no longer boot.
I connected HDD (with Fedora OS) to another computer.Fedora gets past GRUB, but hangs before loading the splash screen.Is something wrong with GRUB settings?Previously, I had dual boot at GRUB (Fedora and WindowsXP).
What is the easiest way to get Fedora to boot properly on another system?I need access to those files.
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Jan 5, 2011
Dell Inspiron E1405 - 160 GB drive with 2 partitions - I think only 1 partition was used for windows and ubuntu Used wubi to install 10.04 - both XPP and 10.04 worked fine after repairing the XP install My boyfriend used Referencer (.reflib) in Ubuntu 10.04 to organize and tag about 900 documents. He spent around 9 hours on the project and its VERY IMPORTANT. I am a dumb ***, forgot the project was on the computer and updated to 10.10 via update manager without it backing up. Now I cant boot to XPP or Ubuntu - "error: no such device:", "grub rescue" My main concern is getting the data back. I would rather uninstall WUBI and install Ubuntu on the 2nd partition (wish I would have done this in the first place but 10.04 was my first Ubuntu install and I didn't know any better). I have to get this data back! I have tried the following and cant locate the referencer (.reflib) file or the .docs and .jpgs booted to USB using my 10.10 netbook remix USB install USB stick - I can see the windows files pulled the HD out and connected it to my Ubuntu netbook, an XPH and W7 computers -cant locate data
[Code]...
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Jan 23, 2010
I'm trying to connect to the VPN of my employer; after fix various minor issues I reach this point in which the DNS entries and the default gateway of the VPN are overwritten with the values of the eth0 device that appears by default. Therefore the vpn is not useful.
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Jun 1, 2015
I have a brand new Z97-PRO (Wifi/USB3.1 version) that I got to replace a Gryphon Z87, and it was working great for the first day. I had my Debian and Windows drives both working, and I was working on getting GRUB reinstalled on the Debian drive in no time. At some point I needed to restore my Windows MBR for the millionth time, but this time was different. The Windows logo popped up and froze there. I know this is a thing that sometimes happens, but every other time since I replaced my Gryphon this process only lasted seconds. I let it sit for hours and it didn't move.
I then tried my Debian live USB, which loaded into the main menu, but upon selecting rescue mode it black screened and hung. This was an issue I experienced when I first got the board, but it seemed to work itself out after a few reboots and remained flawless until it just came back. At this point, I'm unable to get in to any of my OSes and I can't seem to successfully boot any external media in order to fix it. My BIOS is totally stock save for secure boot, which is set to Other OS, and memory in XMP mode. I also tried using an Ubuntu Live USB, but ended up hanging with the exact same Q-Codes as in Debian. I am running the system on 1 stick of RAM while testing.
Q-Codes at hang:
UEFI USB - AF (Exit Boot Services Event)
Regular USB - F6 (Reserved for future AMI progress codes)
Specs:
- 2 boot SSDs (OCZ for Windows, Kingston for Debian), 2 storage drives, and a DVD drive.
- The boot SSDs occupy SATA ports 1 & 2, the DVD drive takes up 3, and the storage drives take up 5 & 6
- i7 4770K, 32GB (8GBx4) Corsair Dominator RAM, GTX780Ti
- 750W Silverstone PSU
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Sep 2, 2010
i had a fully working system (debian /stable) but now i have a weird initrd error and i cant boot.
my boyfriend used to repair all the problems remotely (from the other side of the earth ) i have but now he cant connect at the rescue mode.
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Mar 1, 2016
I had a RAID problem on an HP Proliant server due to a failing disk. When I changed the disk, things got complicated and RAID seemed to be broken. I put back the old disk, repaired the RAID, then changed put the new disk again and all returned to normal except the system doesn't boot. I am stuck at grub stage (the grub rescue prompt). I grabbed a netinst CD and tried to rescue it, at some point, the wizard correctly sees my two partitions sda1 and sda2 and asks wether I want to chroot to sda1 or sda2. I had red screen errors on both.
The error message said to check syslog, syslog says can't mount EXT4 file system beacuse bad superblock. I switched to TTY2 (Alt-F2) and tried fsck.ext4 on sda1 (I think sda2 is the swap because when I ran fsck on it it said something like this partition is too small and suggested that it could be swap) it says bad superblock and bad magic number. I tried e2fsck -b 8193 as suggested by the error message but that too didn't work (I think the -b 8193 is for trying to get he backup superblock).
The RAID is as follows : One RAID array of 4 physical disks that are grouped into one Logical Volume /dev/sda, so the operating system only sees one device instead of four (4 disks).
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Feb 19, 2015
I have a virtual Linux server and i deleted his boot partition by mistake. Now When i try to enter the machine I see
Code:
Select allfilesystem unknown
Grub rescue >
I was told i need to reinstall the server so I've downloaded the ISO files i need.
I've connected the ISO to the machine but i don't know what yo do next.
I've read online that i need to do ls and find where the ISO is so i can boot from it.
But i get error unknown filesystem for everything so i don't know what to do?
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Sep 5, 2010
I downloaded this squeeze live rescue iso and burned to CD.[URL].. When it boots, I get a text login screen prompting for username... Problem is, I cannot find anything on google that gives me a working u/p combo... I have tried a variety of these for username/passwords: live, rescue, user, linux, password.
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Feb 12, 2011
Looking at the versions of Squeeze available on Live CD's from live.Debian.net I noticed a Rescue CD. I decided to download and burn the 386 version in order to get a look at it. I did so and checked the MD5Sum. It indicated a good download. I then used k3b (which I prefer because it has proven to be somewhat more reliable than Brasero) to burn the iso file. I did it at the lowest speed k3b allows (10X for CDs) and asked for verification of the burn. The disk was verified.I then booted the disk and the disk failed to load citing a read error at block 144640, sector 1157120.
I downloaded another version of the same iso file and again checked the MD5Sum, which was good. I again burned with k3b in the same manner as above and got the exactly the same error.I have had no indication of any problem with my TSST CD/DVD drive and I doubt very much that two consecutive Memorex CDs would be bad. What am I missing here?One other question: Is there a way to check the MD5sum on a disk that has been burned? Should it be the same as the MD5Sum shown for the iso file? I see that I can check the MD5Sum for individual files on the burned CD. Given the very large number of files, which one might it make sense to check?
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Jun 18, 2010
I installed debian testing from hard disk using the netinst.iso. Now how can i get the rescue mode to reinstall grub? During installation i didn't get other options like rescue mode.It guided me to install debian testing from hard disk only.
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May 9, 2015
i can't use imondo restore anymore, due to upgtading to jessie, did aynone get to make it work with jessie. I love to use mondo restore because i can get hots backpus, and i can do partial restore so i can restore my full system preserving home foldest, other way i have to move my home folder, very much waste of time. I cant get installed it but it doesnt open up, it says mondo, mindi bad installed or something like that.
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Feb 18, 2012
My system doesn't boot anymore, when I turn on the laptop, instead of the normal grub screen, i get the following:
"error: file not found
Entering rescue mode...
grub rescue> _"
I tried also to make a bootable usb w/ unetbootin but all the distros failed to load w/ a syslinux boot error message so I really need to fix the existing debian installation to get access to my files i need for the university, it's debian stable (6.0.4) on hp mini 210 ....
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Feb 13, 2015
I'm inexperienced in Debian. I have a dual-boot machine (64-bit, Debian 7.3, Windows 7, legacy boot) and encouter a problem at boot ever since I completed the installation of Debian 7.3 alongside the exising Windows 7. This machine has six hard drives: two are intended for ntfs storage of general data (raided together by RAID1); two more are intended for ext4 storage of general data (also raided together by RAID1); the fifth contains the Windows OS files and the sixth contains the Debian OS files. The problem is that I arrive to the grub_rescue each time at boot, seeing the message:
GRUB loading.
Welcome to GRUB!
error: no such device: e081517b-3399-4067-9294-8f0686f753ca.
Entering rescue mode...
grub_rescue>
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Jul 18, 2010
Today it happened again: After an apparently trivial update Grub (Grub2) enters rescue mode the next time booting, not displaying any useful help whatsoever at that point. (Remember that at boot time no manual or help pages are available.) I don't know what went wrong, but ... The harddisk or partition in question is now no longer a bootable partition.
I don't want to use much time trying to sort out things, so unless someone may direct me to at better procedure, I am going to save whatever can be saved from the hd and then reinstall debian (in this case: Sqeeze) from scratch. Nothing else has in my experience ever worked before.
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Dec 26, 2015
Yesterday I used the Live DVD's Rescue Mode to re-install Grub(2) in the MBR of my hard drive. Today, I am surprised to see a very different /etc/apt/sources.list file that only has one line, as follows:
Code: Select alldeb cdrom:[Debian GNU/Linux 8.2.0 _Jessie_ - Official amd64 DVD Binary-1 20150906-11:13]/ jessie contrib main
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Jan 10, 2015
I thought I'd have a go at putting back sysvinit to run the start up daemons, after I discovered that upgrading to jessie removed it and slapped on systemd.
I didn't have any problems at all with systemd, infact it was pure speed at start-up, but after some reading I thought I'd like to go back to usual start-up scripts.
What I did was to boot a Live Debian and mount and chroot into my Debian system, then I ran
Code: Select allsudo apt-get remove --purge --auto-remove systemd
sudo apt-get install sysvinit-core sysvinit sysvinit-utils
On reboot, I hit a grub rescue prompt which says error: file not found.
Trying the methods to get that sorted out gets stuck with "unknown file system" after I use ls and ls(hd1,msdos2) -as well as other combinations - it only seems to work for a plugged in flash drive.
Then I chroot again and run update-grub and grub-install /dev/sdb but reboot still stops at grub rescue.
So I wonder, firstly, why replacing systemd mucked up grub. Then, besides re-install of systemd, how do I get a booting system?
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Jul 9, 2011
I have a linux (dedicated) server on 1and1. Last night, the server crashed and now I'm only able to access it in rescue mode.
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Jan 23, 2016
It happened when I updated my php5.4 to 5.5 version on my small Debian 7 server. I am only getting GRUB right after BIOS boot pass, then none of the keys working even C or Shift buttons to go to command promt except CTRL+ALT+DEL.
I have tried rescue mode with live CD, selected myserver/root/ partition to install GRUB but not worked.
How to recover my server, I have some important data in it and I don`t want to destroy them.
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Sep 19, 2014
I am running a 14 disk RAID 6 on mdadm behind 2 LSI SAS2008's in JBOD mode (no HW raid) on Debian 7 in BIOS legacy mode.
Grub2 is dropping to a rescue shell complaining that "no such device" exists for "mduuid/b1c40379914e5d18dddb893b4dc5a28f".
Output from mdadm:
Code: Select all # mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Nov 7 17:06:02 2012
Raid Level : raid6
Array Size : 35160446976 (33531.62 GiB 36004.30 GB)
Used Dev Size : 2930037248 (2794.30 GiB 3000.36 GB)
Raid Devices : 14
[Code] ....
Output from blkid:
Code: Select all # blkid
/dev/md0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/md/0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/sdd2: UUID="b1c40379-914e-5d18-dddb-893b4dc5a28f" UUID_SUB="09a00673-c9c1-dc15-b792-f0226016a8a6" LABEL="media:0" TYPE="linux_raid_member"
[Code] ....
The UUID for md0 is `2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` so I do not understand why grub insists on looking for `b1c40379914e5d18dddb893b4dc5a28f`.
**Here is the output from `bootinfoscript` 0.61. This contains alot of detailed information, and I couldn't find anything wrong with any of it: [URL] .....
During the grub rescue an `ls` shows the member disks and also shows `(md/0)` but if I try an `ls (md/0)` I get an unknown disk error. Trying an `ls` on any member device results in unknown filesystem. The filesystem on the md0 is XFS, and I assume the unknown filesystem is normal if its trying to read an individual disk instead of md0.
I have come close to losing my mind over this, I've tried uninstalling and reinstalling grub numerous times, `update-initramfs -u -k all` numerous times, `update-grub` numerous times, `grub-install` numerous times to all member disks without error, etc.
I even tried manually editing `grub.cfg` to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `(md/0)` and then re-install grub, but the exact same error of no such device mduuid/b1c40379914e5d18dddb893b4dc5a28f still happened.
[URL] ....
One thing I noticed is it is only showing half the disks. I am not sure if this matters or is important or not, but one theory would be because there are two LSI cards physically in the machine.
This last screenshot was shown after I specifically altered grub.cfg to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `mduuid/2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` and then re-ran grub-install on all member drives. Where it is getting this old b1c* address I have no clue.
I even tried installing a SATA drive on /dev/sda, outside of the array, and installing grub on it and booting from it. Still, same identical error.
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Jan 18, 2011
I had Ubuntu installed, i installed Debian and there was no dual boot. So i formated all the hard disk to install only Debian. It installed but at boot i get error: no such device and the grub rescue> prompt. i googled for a solution and nothing worked:
- i tryed reinstalling grub, not worked
- i did the windows cd fixmbr trick, not worked
- reinstalled debian with fixmbr the first step and nothing
- tryed deleting with dd the mbr, not worked
- reinstalled grub from debian rescue, not worked
what should i do? i can't access my computer? please tell me how should i fix it? the google guys will kill me because i put their servers on fire
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