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w00ly 08-20-2009 03:02 PM
Destroyed my NTFS partition?
 
About every 2 years or so I get tired of windows and it's slow speed and decide to give linux a try. Invariably some major catastrophe ends up happening and performing some basic task ends up not working and I go back

About a month ago I started this cycle's adventure with Kubuntu 9.04. I install it, do dist-upgrade and add codecs and samba and a few other tweaks here and there. Somewhere in this process I start getting hard crashes: ctrl alt backspace doesnt work (even though I enabled it), nor ctrl alt f1 nor alt sysrq r. I dont have to be doing anything specific...most of the time i'm watching a video and i'll get a screen flicker, the video will stop, audio continues for 60 seconds then complete stop (besides being able to move the mouse some). Also had the "flicker of death" when converting avi files to DVD format with DeVeDe and wine/Convertxtodvd.

Rebooting also causes a crash if samba shares are mounted or a disk is in the cdrom (thus forcing me to restart by holding the power button since the escape keys dont work). I'm not sure why but it's either a message about cifs or a blank screen with the cdrom drive buzzing away. I tried upgrading to 2.6.30 kernel but that stopped my network card from functioning. Well that's kinda frustrating...I like KDE better than Gnome but it's not working very well.

I'd LIKE to like linux more than windows so I figure I'll give regular Ubuntu a try before making the switch back to something functional. I wanted to give my linux partition more space in case I decide to install both KDE and Gnome. So I start using ntfsresize to shrink my ntfs partition. I run through the info/test modes and all goes well. I make the actual run through ntfsresize and all goes well. Then it tells me I have to use fdisk to create the new partition. "wtf? Ok, that should probably be automatic with the 'ntfsresize' that I just did, but whatever.." I load up fdisk. I delete /dev/sda5. Then I add it back, making sure to put the starting cyclinder at 1031 like it was before and I added 1gb to the size for good measure. Set type to 7 for NTFS. Write changes to disk. Reboot. Come back and my drive isnt showing any more Reboot again to Ubuntu live disk and do the same thing except size to the exact same as what it was shrunk to. Same problem
Code:
ubuntu@ubuntu:/mnt$ sudo fdisk -l

Disk /dev/sda: 200.0 GB, 200049647616 bytes
255 heads, 63 sectors/track, 24321 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xf806f806

  Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *          1        790    6345643+  83  Linux
/dev/sda2            791      24321  189012757+  f  W95 Ext'd (LBA)
/dev/sda5            1031      17986  136199070    7  HPFS/NTFS

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x13c5a9de

  Device Boot      Start        End      Blocks  Id  System
/dev/sdb1              1      60801  488384001    7  HPFS/NTFS
ubuntu@ubuntu:/mnt$ sudo mount.ntfs /dev/sda5 /mnt/ddrive
NTFS signature is missing.
Failed to mount '/dev/sda5': Invalid argument
The device '/dev/sda5' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
In gparted it's showing /dev/sda5 actually in a submenu of /dev/sda2...i'm not sure why it's doing this because they were all seperate before...though I cant remember what /dev/sda2 actually was...it may be the swap partition that's now gone.

Please if someone knows how I can recover my data i'd be eternally grateful. I backed up some stuff but didnt have enough space to backup all of it (and of course I forgot about critical files AFTER I had done this). I'm still gonna give Ubuntu a try but right now recovering my data is the #1 priority.

pljvaldez 08-20-2009 03:05 PM
Try using testdisk to recover the partition table.

w00ly 08-20-2009 03:44 PM
Thanks for the reply! Doing a quick search and a deep search didnt even locate it.
Code:
Disk /dev/sda - 200 GB / 186 GiB - CHS 24321 255 63

    Partition                  Start        End    Size in sectors

 1 * Linux                    0  1  1  789 254 63  12691287
 2 E extended LBA          790  1  1  1029 254 63    3855537
 5 L Linux Swap            790  2  1  1029 254 63    3855474
I hit enter then quit and went back into analyse and it shows
Code:
Disk /dev/sda - 200 GB / 186 GiB - CHS 24321 255 63
Current partition structure:
    Partition                  Start        End    Size in sectors

 1 * Linux                    0  1  1  789 254 63  12691287
 2 E extended LBA          790  0  1 24320 254 63  378025515
Invalid NTFS boot
 5 L HPFS - NTFS          1030  0  1 17985 254 63  272398140
 5 L HPFS - NTFS          1030  0  1 17985 254 63  272398140
but I dont see any recovery options. Also noticed that it's showing cylinder start at 1031 even though I specified 1031 in fdisk (and it still shows that)

jiml8 08-21-2009 02:47 AM
You have Windows installed on a virtual partition? Where is boot.ini and ntldr? IIRC those HAVE to be in the first 1024 cylinders.

Also resizentfs certainly won't create a new partition. What it will do is resize first the ntfs filesystem and then (optionally) the partition in which that filesystem resides.

Note that fdisk counts cylinders from one but testdisk is counting from zero, hence the discrepancy.

Why does sda5 not start at the same place that sda2 starts? I would certainly expect it to.

You must have gotten your starting point in sda5 misaligned. Keep in mind that fdisk lets you start on cylinder boundaries, but many other tools don't do that. So fdisk lacks the granularity you needed. You would have been better off using parted or gparted.

Try deleting sda5 again using fdisk, then run testdisk and see if the NTFS partition is found. There is a decent chance that when you created your new sda5, the partition boot record overwrote part of the NTFS master file block, which isn't fatal because there is a duplicate copy at the end of the file system. Of course, since you just resized the filesystem, you'll just have to hope that nothing went wrong with that procedure.


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