<div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Thanks a lot Nils for a early reply. Yea seems like that only. Even i thought so. Let me see </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Peter , thanks for your reply too.. Yes i now understand and realise the value of backups. How do i make a image of the broken file system ? I am not having so much expertise. Could u guide me ? </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Thanks in advance </div></div><div class="gmail_extra"> <div class="gmail_quote">On Thu, May 28, 2015 at 12:36 PM, Petter Adsen <<a href="mailto:petter@synth.no" target="_blank">petter@synth.no</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Wed, 27 May 2015 22:59:42 +0200 Nils Kassube <<a href="mailto:kassube@gmx.net">kassube@gmx.net</a>> wrote: > Hari wrote: > > I have a dual boot - Ubuntu and windows 7. I recently wass playing > > around in the ubuntu and used the 'dd' command and it kinda > > corrupted my linux file system. I exactly dont know what happened > > to Linux now. All my data is missing. I did the boot-repair and now > > the grub is removed and it is directly booting to windows. Please > > help me recover all my data in ubuntu. It is very important. Please > > help me with the process. I am desperate!! > > > > Here is the pastebin link containing the logs. > > > > <a href="http://paste.ubuntu.com/11395840/" target="_blank">paste.ubuntu.com/11395840/</a> > > | sda6: > ... > | Mounting failed: mount: unknown filesystem type '' > > To me it looks like your Ubuntu system was on /dev/sda6 (the other > partitions seem to be OK). With your dd command you overwrote vital > parts of that partition. IMHO it would be best to try to recover > remaining data using photorec / testdisk (unless you have a backup of > your valuable data). Then you would reinstall the system from > scratch. But please wait for other opinions before you proceed. I'm with Nils on this. photorec and/or testdisk may be able to retrieve some of the data for you, you can also try gddrescue or myrescue. The best approach, if you have the space, would be to make an image of the broken file system, and run the rescue tools on the image, or at least make sure you do not disturb the broken partition further while attempting to rescue data. Thus, if one tool fails to rescue anything, you can try the others, as no changes has been made to it. This is also a really good candidate for an occasion to learn the value of frequent backups. And to be careful when you run things as root. To add to this, I feel sorry for you - I really do. We have all been in a similar situation at one time, and the most valuable thing you can get out of this (apart from retrieving your data) is to learn that backups are necessary, not optional. It is also important to state that when you work to retrieve your data, it is far better to ask here first than to do something you don't understand the consequences of. The process can get complex, and you might need to make difficult choices. Get all the help you can. There are also commercial tools for data recovery, the only one I know of is R-Studio, but I know there are more. I haven't tried any of them, though, so I don't know if they're worth the money. If the data is absolutely critical, you should take it to a professional data recovery service rather than do anything wrong and ruin them completely. Good luck! Petter -- "I'm ionized" "Are you sure?" "I'm positive." -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a> </blockquote></div> </div>