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13

In your case, the correct selection is /dev/sda, the first one. It's the first and only hard disk in your system, whereas /dev/sda1 is a partition on that hard disk. You can install grub on a partition, but it's a "BAD idea". If you had multiple hard drives and paritions, first find out where your root partition is: df | grep /$ You can then install grub ...


12

Yes, sure. $ dd if=/dev/sda of=mbr bs=512 count=1 1+0 records in 1+0 records out 512 bytes (512 B) copied, 0.000188571 s, 2.7 MB/s $ stat -c %s mbr 512 $ hd mbr 00000000 eb 48 90 d0 bc 00 7c 8e c0 8e d8 be 00 7c bf 00 |.H....|......|..| 00000010 06 b9 00 02 fc f3 a4 50 68 1c 06 cb fb b9 04 00 |.......Ph.......| 00000020 bd be 07 80 7e 00 00 7c 0b ...


7

See: http://www.digital-experts.de/doc/mbr/REASDME . 4. The boot process ~~~~~~~~~~~~~~~~~~~ When the MBR is first loaded it waits for a configurable length of time (1 second by default), monitoring the keyboard, for key presses. If the MBR detects a key press, it will interrupt the boot process, and display it's prompt. Otherwise, it will ...


5

Use fdisk. Put it into sector mode with the u command, then p to print the table, d to delete the partition, and then n to recreate it. When you recreate it, use the same starting sector, but an ending sector that actually fits within the disk. When you are done and have double checked ( p again ), save and quit with w.


5

Could you create a Bootinfo Summary report using the boot-repair tool as described below and then post the link to the report? I know you have already provided some details about your boot configuration. However, the report I am asking for contains more detailed information and might give us a better understanding of why you are unable to boot Windows ...


5

I'm the author of gdisk, and I agree with what psusi has written, with the caveat that I can't know what's really on /dev/sda5, so I can't say if it's safe to remove it. If it's the stuff that you've burned to your recovery DVDs, it should be safe to delete it, though. If there's sufficient free space on /dev/sda5 (about 17 KiB), you should be able to ...


4

Install the MBR to the disk with Ubuntu on it and configure the BIOS to boot from Ubuntu's disk instead of the Win7 one. Since you cannot boot into Ubuntu, you'll need the Live CD to boot and repair things. Boot from the Live CD. Mount the partition containing the Ubuntu installation (by opening it in the file browser for example) Open a Terminal Run the ...


3

Yes, it does look like a typical MBR error message. I ended up with a similar situation, although I was able to reinstall grub from a liveCD and then boot into Ubuntu well enough. (I don't know if your boot repair program reinstalls grub; if not, I'll post the instructions below. I can't take credit for them, but I don't know any longer where I got them.) ...


3

If you had really important files in your Vista partition, then stop doing anything. If you had erased your files, each time that you write to you're disk recovery will be harder. Go to some professional that can help you to recover the files. If the files are not so important, i.e. you don't want to pay to recover them, the first thing to do is to know ...


3

The answer to your first question is yes, because I am doing it now. I would guess it's probably a Microsoft design decision to encourage adoption of UEFI, rather than a technical reason. UEFI allows Secure Boot and similar stuff that is more important to MS than to its customers. I don't know of a way to let windows boot from GPT with a legacy BIOS, but ...


3

First, your partition table appears to have two active partitions, which may prevent your computer from booting even if you fix the problem of the MBR. Windows's MBR boot is kind of funky because it uses a "default" MBR to load the MBR of the active partition. Before you change the boot records, try unmarking one of the partitions and booting. If that ...


2

Should work just fine. If you want to see what the 776MB are, take a look into the folder /ext4a using nautilus or a terminal. Because it is mounted it will have an entry in the file /etc/fstab. Edit it and delete the entry for /dev/sda1 respectively /ext4a. You are also right about sda5 and sda6. sda5 is the root mount point /. That means everything that ...


2

Have a look at this post. If you installed ubuntu using a USB, then grub may have been installed to the usb, try booting with the usb connected. If you then see grub and can boot ubuntu, follow our solution in the above link or look at this page on my website for more details. If not you could try booting the live ubuntu disc and using boot repair.


2

CALM DOWN, do not rush, do not blindly run any tools trying to fix things. STOP using the disk. Make sure you don't write a single byte on it If the data is really valuable, consider using professional help - there are organizations which commercially restore data on hard drives, they'll certainly do better than you Get a hard drive bigger that the stuffed ...


2

It's an alignment thing For performance reasons you really want your storage to be aligned on all levels. While this is probably just a simple hard drive with a partition table and a file system on it directly, it's still important to not misalign it. What about alignment? Suppose your hard drive works with 4 kB sectors (yours appear to work with 512 ...


2

The number 0800 in hexadecimal form converts to 2048 in decimal form. The command to convert a hexadecimal number to decimal is: echo "ibase=16; hex-number"|bc Running the command: echo "ibase=16; 0800"|bc Returns the result: 2048


2

If you have a usb thumb drive, you can use penndrivelinux from windows to make it bootable with an applicable distribution. From there you can fix it using boot-repair. Please see: https://help.ubuntu.com/community/Boot-Repair http://www.pendrivelinux.com/


2

If you use the fixmbr command in Windows, then assuming it succeeds, it will write the Windows boot loader to the Master Boot Record. That will overwrite the part of GRUB (Ubuntu's boot loader) that is installed to the MBR, and you will not have an option to boot Ubuntu. However, that's not usually a big problem, as it's quite easy to put Ubuntu's boot ...


2

It's possible and it's easier than you think. Linux can boot fine from a GPT disk in BIOS mode, so there's no need to do the MBR-to-GPT conversion. With any luck, all you'll need to do is to install a BIOS-mode boot loader (GRUB, LILO, or SYSLINUX) to the disk. There are three caveats, though: I've never used LUKS, so I'm not sure how this would affect ...


2

I figured out the exact way by myself. Rod Smith was right, its easier that I thought. Here the solution if anybody else needs it: Original Partition Layout: /dev/sda1 (EFI Partition) /dev/sda2 (Boot Partition) /dev/sda3 (LVM2/LUKS encrypted Root & Swap) Convertig to BIOS boot: I deleted the EFI Partition and created a new partition with the ...


2

If you want to boot an ISO file in an easy fashion you normally use a tool like unetbootin or others availiable at the http://www.pendrivelinux.com/ web site. If you want to boot just ISO files specifically you could set up grub2 on a flash drive and use the 'boot iso feature' of grub2. The issue with this method is each disrto seems to have its own ...


2

You can use open-source tool: TestDisk to repair the corrupt partition table. Example of repair a damaged partition table: http://geekyprojects.com/storage/how-to-repair-a-damaged-partition-table-or-mbr/


2

Well, you can use a LiveCD to re-install GRUB so I recommend that you download the LiveCD. This thread, this thread and this thread might be useful to you. Look for the section explaining how to re-install GRUB2 in the first thread. (Also LiveCD is useful when you want to recover data.)


2

http://ubuntuforums.org/showthread.php?t=1639198 by following the instructions on that page I was able to install lilo. Lilo gives me two options ubuntu and windows. Windows works directly, choosing ubuntu brings me to grub which allows me to boot ubuntu. Yes grub gives a warning about an invalid background colour but at least my machine is usable (or as ...


2

I never got in trouble by using these instructions: https://wiki.ubuntu.com/Grub2#Recover First of all, you must start your system from a live cd. Then "METHOD 3 - CHROOT This method of installation uses the chroot command to gain access to the broken system's files. Once the chroot command is issued, the LiveCD treats the broken system's / as its own. ...


2

I got the same error message. The installation configuration that led to this message is as follows: /dev/sda1 ntfs :windows partition /dev/sda2 ntfs :windows partition /dev/sda3 ntfs :windows partition /dev/sda5 :swap partition /dev/sda6 ext4 :/ partition /dev/sda7 ext4 :/home partition /dev/sda8 ...


2

It looks like none of your partitions on /dev/sda have bootable flag set - compare the fdisk -l output with /dev/sdb - see the star in the Boot column next to /dev/sdb1? You need to set it on /dev/sda1 To set bootable flag, start fdisk with fdisk /dev/sda (from your LiveCD, as root). There, press "a" and then enter "1". then press "w" to write your ...


2

The problem is that you currently have two Ubuntu installations, each with their own grub.cfg, but only one grub installation. When you boot your computer, grub loads and reads the grub.cfg from OS #2. To make it so that grub reads from OS #1's grub.cfg you need to install grub from within OS #1. In addition you want to make sure that OS #2 is not configured ...


2

Boot to ubuntu. Format your bootable partition with gparted. In gparted set the bootable flag again to the formatted partition. Run sudo update-grub to reinstall grub. Explanation: As there is no mint, grub won't detect the kernel, but it will reinstall itself to mbr with ubuntu kernel. If you messed up everything and want to correct things. Boot a live ...


2

Ok it seems that it is not a problem of MBR in my case. On a Mac there are GPT and MBR. You must use the Disk utility of Mac OSX to make all partitions because this is the only tool which is able to synchronise GPT and MBR (they are note made to work together, it is usually one of them). I think it was my problem because I succeed, even in putting grub on ...



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