Changed partition type, computer won't boot. "GRUB Error 17"

[Esoteric.caek]

Ah! It booted! The first steps of progress in over 6 hours. It took me an extra 2 or so to clear my BIOS password I'd set and forgotten. lmao.
I'll post the info I gather asap

[Esoteric.caek]

Here's the output:

ubuntu@ubuntu:~$ sudo fdisk -l
Warning: ignoring extra data in partition table 5
Warning: ignoring extra data in partition table 5
Ignoring extra extended partition 4

Disk /dev/sda: 400.1 GB, 400088457216 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x2254cdfe

Device Boot Start End Blocks Id System
/dev/sda1 1 1274 10233373+ 12 Compaq diagnostics
/dev/sda2 * 1275 24975 190378282+ 85 Linux extended
/dev/sda3 24976 44836 159533482+ 7 HPFS/NTFS
/dev/sda4 44837 48641 30563662+ 5 Extended
/dev/sda5 ? 1684 121065 958924038+ 70 DiskSecure Multi-Boot
ubuntu@ubuntu:~$ ^C
ubuntu@ubuntu:~$

The second drive is the drive I accidentally converted, as you can most likely assume. So.. what now? =/

[Esoteric.caek]

Halp ;_;

[jbrown96]

Here's what you need to do.
1) backup your partition table

sudo dd if=/devsda of=Desktop/partition-table.txt bs=512 count=1

This will put a file on your desktop. Save this file somewhere safe.
2) You really should backup the entire drive, but you will need one with as much free space as this entire drive is. Going to assume that you won't be able to do this.
3) Open gparted and figure out exactly how big your broken NTFS partition is. You need the exact MB where it starts and ends.
4) try to change the partition back. Hopefully this will work.

sudo parted /dev/sda mkpart primary ntfs START END

replace START and END with what you found in #3.
5) You did save that table somewhere right!!
6) Reboot and see if it works.

[Esoteric.caek]

I'll try all this now. I'm using the Gparted that is found in ubuntu, right?

[Esoteric.caek]

Here's what you need to do.
1) backup your partition table

sudo dd if=/devsda of=Desktop/partition-table.txt bs=512 count=1

This will put a file on your desktop. Save this file somewhere safe.
2) You really should backup the entire drive, but you will need one with as much free space as this entire drive is. Going to assume that you won't be able to do this.
3) Open gparted and figure out exactly how big your broken NTFS partition is. You need the exact MB where it starts and ends.
4) try to change the partition back. Hopefully this will work.

sudo parted /dev/sda mkpart primary ntfs START END

replace START and END with what you found in #3.
5) You did save that table somewhere right!!
6) Reboot and see if it works.

I put in the first string of code and got this:
"dd: opening `/devsda': No such file or directory"

I'm not sure what to do about that.

[JKyleOKC]

I put in the first string of code and got this:
"dd: opening `/devsda': No such file or directory"

I'm not sure what to do about that.

There needs to be a / between the v and the s, so that it's "/dev/sda" and then it should work. This must have been a typo in the original message...

[Esoteric.caek]

There needs to be a / between the v and the s, so that it's "/dev/sda" and then it should work. This must have been a typo in the original message...

That worked. Thank you!
Following the rest of the instructions now..

[Esoteric.caek]

I have an external harddrive with 360 GB of free space- plenty to hold all the corrupted drive's data.
Should I make an image of the entire drive and put it on the external drive?

[audiomick]

I have an external harddrive with 360 GB of free space- plenty to hold all the corrupted drive's data.
Should I make an image of the entire drive and put it on the external drive?

Hallo. First of all, my deepest sympathy...

I can't help you much with this, except for this advice

You are in a situation where maybe all is lost. If what you are trying fails, it may make things worse, so...

If you have the chance to copy the disc before you start messing around with it, do it. If all else fails, you still might be able to rescue files from the copy

good luck
Michael