Ubuntu / Apple :: MBR Partition - REFIt And Gptsync Are Unable To Repair The MBR Error
Sep 23, 2010
I've used rEFIt and to create a dual boot system on a new MacBook Pro 7. 1 following the directions in the community forum. I can book ubuntu and mac os x fine. However, the MBR boot table shows an error in the partition map.
[Code]...
How can I fix this, rEFIt and gptsync are unable to repair the MBR error... Will this cause problems (since MBR shows the ubuntu boot partition overlapping the OSX partition)?
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Feb 15, 2010
I'm not the world's biggest fan of rEFIt to be perfectly honest. It doesn't allow me to customize the menu, set a default, etc. I'd rather boot exclusively using grub-efi. Not just that, I'd prefer to be able to do so without needing an hfs+ volume to bless it onto. edit: I can now see that Elv117 has asked this recently. I shall leave this post here in the hopes that someone knowledgable runs across it and not the one further down the page. Also, I'll probably try working through the tutorial to see if I can manage it. I need to evaluate if I really need OS X at all on my MacBook. I think it would be neat to have GPT/Grub2/MacOSX/Ubuntu/Win7 working properly, the way a "modern" computer ought to. Reverting to MBR is just throwing in the towel.
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Mar 16, 2010
I decided that I wanted to take Arch for a spin for the next week or so (I've had Ubuntu installed for a while) and so I thought the logical thing to do was to erase my partitions and start over with a new live cd...
Well.. that didn't work. I tried to do it from Disk Utility in OS X which succeeded in deleting most everything... EXCEPT grub is still in the mbr (or whatever it runs from through rEFIt). But all I see when I start up in the non-OS X partition is:
Code:
GRUB
At any rate, no Live CDs work, I can't delete the partitions from OS X (including after booting up from the OS X Install disk).
If I hit F1 I can get the "grub>" prompt. But I can't figure out how to launch a live cd. To my knowlege, there's not a "bios" for rEFIt where I can force it to boot from CD, is there?
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Jul 21, 2010
I have OS X, Ubuntu 10 x64 and Windows 7 x64 installed on my Macbook Pro new unibody. Right now when I choose Windows or Linux in the rEFIt boot menu both options take me to the GRUB menu, and I can boot everything but it's a bit redundant and annoying.
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Nov 10, 2010
I have installed Kubuntu (10.10) on top of OSX (10.6) on my MacBook (7.1). When I start the computer, rEFIt asks me if I want to boot on OSX or Linux. When a USB key is plugged in and bootable, rEFIt also asks me if I want to boot on it. However, if I select the USB key, rEFIt still boots Linux on my HDD! What did I wrong?
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Jun 29, 2011
My friend has an older Macbook Pro (circa 2006) and she installed Ubuntu 11.04 on it but the Appleloader wouldn't boot it directly (to boot to ubuntu I had to use super grub disk 2 to load grub2). I never got it to work correctly. She just updated rEFIt and it displays all the icons for windows and linux now, but she can't boot either of them, it just gives her a black screen with a blinking cursor up in the left-hand corner.I suggested the easiest way to fix it would be to wipe everything and start over, but she doesn't want to. I barely know anything about macs and all the triple boot guides I've found are for fresh installs.
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Aug 3, 2010
First up, assume i know nothing about computers. I have a MBP 5,5, and choosing the logo for windows brings up the grub menu, as does choosing ubuntu's logo. I've read a lot saying i need to install GRUB natively under ubuntu, but I've had no luck doing so. can anyone essentially walk me through this step by step? or offer alternatives?
MBP 5,5
OS X 10.6.4
Win 7
ubuntu 10.04
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Feb 10, 2011
I had my MacBook configured with a triple boot (Windows 7, Mac OSX and Ubuntu 10.04). Everything was working perfectly until I decided to upgrade to Ubuntu 10.10 and screwed everything up haha.
I formated the Ubuntu partition and installed 10.10 on it, but I made the mistake of not selecting the correct place for the boot loader. I went the non confusing way and decided to format the Ubuntu and Windows 7 partition to start all over again.
The problem si this, for some reason rEFIT shows a Linux partition when there isn't any, I just have my HD partitioned like this:
This is what rEFIT shows:
The partitions are empty, I haven't installed any OS yet.
Do you know how can I delete that extra Linux icon?
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Apr 23, 2010
I have a 5,2 macbook pro, and I use refit to boot my ubuntu partition. I do not have an OSX partition on the local drive at all. The only partitions that are on the drive are the EFI, ubuntu and swap. Refit lives on the EFI dos partition.I am experiencing a very long delay on power-on before the system will load refit (probably 20-30 seconds) Once it loads everything is normal.
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Jan 24, 2010
I got ReFit installed on my macbook but I get two icons: the apple and a grey windows sign. I want the penguin, so any ideas on how to change the horrendous Windows icon to the cute much-wanted penguin?
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Aug 12, 2010
would putting ubuntu on an external hard drive and booting it from refit work? and would i was starting up my imac 11,2 my ipod was bootable for some reason?
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Mar 24, 2011
I have installed reFIT-based triple boot. Here is the partition scheme:1. GPT Protective Partition (GPT and MFT). Mac OS X (GPT and MFT)3. Windows 7 64-bit C: (GPT and MFT)4. Windows 7 64-bit D: (GPT and MFT)5. Ubuntu 10.04 / (only GPT)6. Ubuntu 10.04 swap (only GPT)Windows only supports MFT and thus sees last two partitions (5 and 6) as unallocated space. Can I somehow make it see these partitions to be able to access files from Ubuntu?P.S. I know this is rather Windows problem, but I don't know any good forums where I can ask that, because mostly on these forums the answer is "Why would you need anything but Windows?".
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Mar 10, 2011
This seems to be a variant of a problem many people have had, but after several hours trawling through various forums, I haven't seen a reliable match for my situation.In brief:Adding a third boot partition (of Ubuntu) to my existing dual boot of OSX 10.6 and Windows 7 seems to have crippled the Windows boot from working, because Grub apparently takes over the process. Yet Grub does *not* appear to be on the Windows partition.
More verbose:I have an older MacBook Pro (3.1, running Snow Leopard) that I recently refitted with a new 240GB SSD HD. With the extra space (it was previously only 120GB) I decided to add a dual boot with Windows 7 using bootcamp. This all went swimmingly well.Encouraged, I decided to follow this Lifehacker article's suggestion and triple-boot the machine with Ubuntu (I'd never used Linux before):So I now have the nice rEFIt boot partition selection screen, and, indeed, I'm up and running in Ubuntu, and enjoying it.
Only one problem: I can't get into Windows any more. If I try to go in through rEFIt *or* by holding down OPT at startup and selecting the windows partition directly, the result is the same: I get thrown into Grub's selector, and selecting the Windows partition from there leads to an error message and a dead end.Having read through numerous postings, I get the impression that Grub is doing something or living somewhere that it ought not to be, but in most cases I've seen, people had accidentally installed Grub onto the Windows partition (or indeed onto EVERY partition). So far as I can tell, this isn't the case with me. Here's my boot summary:
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
[code]....
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Dec 7, 2010
I have a Macbook 2,1 since 2007. Last week my hard drive just died, so I decided to replace it with a new one, no problems with that. The problem came when I had to install an operative system, because my DVD drive has been broken for a year and a half now. I know we can easily install MacOSX from an external usb drive, but I don't have a big enough pendrive at the moment. So I went for Ubuntu. I have managed to get an Ubuntu 10.10 live usb stick working like charm, if anyone is interested. I just downloaded the latest i386 iso and followed this advice by pxwpxw for the 32bit EFI.
The only thing I had to change in the boot.cfg was the name of the iso and -very important- changed initrd.gz for initrd.lz. The live usb works great. But I decided to do an installation on the hard drive. I installed it using the whole hard drive and didn't get any errors. But when I boot the macbook it doesn't detect anything. I guess I need an EFI bootloader or something to make it work. I've tried to follow this guide but it seems to be intended for someone who already has MacOSX and the Ubuntu installation working. I just want to install a bootloader or whatever I need from the "outside" (from the live usb I'm using). I tried to just throw reFit into the main hard drive's root folder but it doesn't work. I think that maybe creating an HFS+ partition and installing reFit in it may work, but I don't think I can create that kind of partition from the Ubuntu usb and I also need a working MacOSX to run the enable.sh. I've also read of elilo but I've seen that it hasn't been updated for 3 years
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Sep 19, 2009
I am using Fedora core 10. I have changed my partition size of Linux from windows. After I finished resizing the partition, I rebooted my system to the Linux platform. While booting it gave me an
error: repair filesytem #1:
I don't know what to do?
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Aug 23, 2010
I installed Ubuntu as shown in the wiki and when I went to restart it gave me a lovely blinking cursor and nothing else. So I held down option, loaded into osx, reinstalled rEFIt and got my menu on startup. Unfortunately, the partition sync tool doesn't seam to be working, it gives me an error: Status: MBR partition table is invalid, partitions overlap. Error: Not Found returned from gptsync.efi
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Jan 4, 2011
After reboot I saw this communication:Quote:Target filesystem doesn't have requested /sbin/init.No init found. Try passing init= bootarg.and I can't shutdown the system normally because it stops (live cd too).Then I can't repair this partition because it is always busy.
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Jul 29, 2010
I just now re-installed 10.04 on my box, but now I can't get back into Windows. I'm getting the BOOTMGR not found error, that I'm familiar with, but the circumstances surrounding it are completely new to me. In the past I've encountered errors from hard-shutdowns where I couldn't mount the partition, until I checked it with windows first, but I can't boot into windows at all any more. I'm pretty sure my grub is pointing to the right location:
[Code]...
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May 21, 2011
A few months ago I tried to shrink an NTFS partition using gparted and use the free space to install Haiku. However, gparted crashed in the middle of the resize, leading to a corrupt partition table. I tried to solve the problem myself, using testdisk to detect the partitions. However, the fix is not perfect, and it left me with a partition table that goes "outside" of the disk (i.e. the partition table has allocated more sectors than there actually are on the disk to the last partition).
Recently I need to reinstall Ubuntu Natty, but because the partition table is corrupt, the installer on the Ubuntu Natty Live CD (as well as gparted) see the disk as entirely unpartitioned. What is weird is that the Disk Utility (aka palimpsest), fdisk on my current Natty distro (upgraded from Maverick, which I want to replace with a fresh install), and GRUB 2 see the partitions fine (with some errors, such as listing a few trillion TBs of available space, a result of the corrupt partition table).
I am using an Asus U30Jc laptop with a single 500GB HDD. My current setup is supposed to be like this:
/dev/sda1: A hidden FAT32 recovery partition generated by Windows 7, listed as containing Windows Vista by GRUB 2
/dev/sda2: NTFS partition containing Windows 7 (labeled "OS")
/dev/sda3: Extended partition containing "DATA", Ubuntu, swap, and the erroneous trillions of TBs of space
/dev/sda5: NTFS partition containing user data (labeled "DATA")
/dev/sda6: Ext4 partition containing Ubuntu
/dev/sda7: swap partition
(*Though I'm not supposed to have it, and it isn't listed in /dev while running the Live CD, /dev/sda4 exists as a zero-length partition in the output from sfdisk; not sure why)
Currently I've tried the following:
- testdisk, using "deeper search" and writing the partition table back to disk; produced a (usable) partition table that was bad.
- [URL], fsck didn't do much at all, except raise various errors on all partitions except the one containing Natty.
- [URL], tried to substitute the numbers caljohnsmith gave to thegreat with the corresponding values from my run of fdisk -lu, but because caljohnsmith didn't explain where the values came from and what they meant (no offense to him), I was lost; after the last step (setting the end sector on the extended partition to the last cylinder boundary (which I didn't really understand; tell me if you need details on what I did)), gparted went from showing the trillions of TBs of free space as outside all partitions to showing them as inside the extended partition; this also somehow caused the partitions to overlap.(The error parted raises changed from "Error: Can't have a partition outside the disk!" to "Error: Can't have overlapping partitions.
Running fdisk from the Natty Live CD gives
Code:
ubuntu@ubuntu:~$ sudo fdisk -lu
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x74ef0aca
Device Boot Start End Blocks Id System
/dev/sda1 2048 34812854 17405403+ 1c Hidden W95 FAT32 (LBA)
/dev/sda2 * 34812855 279000854 122094000 7 HPFS/NTFS
/dev/sda3 279000855 976768064 348883605 f W95 Ext'd (LBA)
/dev/sda5 279000918 875204030 298101556+ 7 HPFS/NTFS
/dev/sda6 875204608 972859391 48827392 83 Linux
/dev/sda7 972861440 976771055 1954808 82 Linux swap / Solaris
Running sfdisk -l from the Natty Live CD gives
Code:
ubuntu@ubuntu:~$ sudo sfdisk -l /dev/sda
Disk /dev/sda: 60801 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sda1 0+ 2166 2167- 17405403+ 1c Hidden W95 FAT32 (LBA)
/dev/sda2 * 2167 17366 15200 122094000 7 HPFS/NTFS
/dev/sda3 17367 60800 43434 348883605 f W95 Ext'd (LBA)
/dev/sda4 0 - 0 0 0 Empty
/dev/sda5 17367+ 54478- 37112- 298101556+ 7 HPFS/NTFS
/dev/sda6 54478+ 60557- 6079- 48827392 83 Linux
/dev/sda7 60557+ 60801- 244- 1954808 82 Linux swap / Solaris
Running parted from the Natty Live CD gives
Code:
ubuntu@ubuntu:~$ sudo parted /dev/sda print
Error: Can't have overlapping partitions.
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May 7, 2010
A drive in a RAID array failed and as a result one of the partitions held on the LVM has corrupted. The result of LVS is below.
Code:
[root@brassxen3 ~]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
MGT VG_XenStorage-511bee02-d169-b418-6a9e-a88b7e3ce939 -wi--- 4.00M
[Code]....
This partition belongs to a virtual machine, the partition is not visible when booting this VM using a live CD or attaching it to another VM. When booting anything with this partition attached it takes hours to boot.
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Jan 4, 2011
After reboot I saw this communication:
Quote:
Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. and I can't shutdown the system normally because it stops (live cd too). Then I can't repair this partition because it is always busy. I have on this partition important files.
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Jan 7, 2010
the U3 system mounts on dev/sr1 while the rest oi the 8 GB USB drive is usually /dev/sdb or sometimes /dev/sdc.
fdisk will not write to this /dev/sr1 partition
Code:
[root@localhost ~]# fdisk /dev/sr1
You will not be able to write the partition table.
Note: sector size is 2048 (not 512)
[code].....
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Aug 6, 2010
I ve got a dual boot, XP and FC 12 on a single harddrive. After defragmentation of NTFS partition (With XP installation) cant'boot linux So, rub statrts with boot menu after selecting linux it tries to load linux but prints out some messages again and again (I do not remember contetn of messages) And these messages are circulating
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Aug 12, 2010
FC13 and Ubuntu 10.04 - both 64bit. Hardware: MBP 5,4 Here's how I do the install:
1. Boot to Ubuntu LiveCD and wipe disk.
2. Create a msdos partition table via gparted
3. Reboot from FC13 or Ubuntu install disk and continue to install with installer suggested partition scheme.
4. Reboot and get an error that says "uncompression error -- System halted"
Variation that I have tried:
1. After #3, boot into FC13 or Ubuntu rescue mode, chroot to hd image and run:
# grub
> root (hd0,0)
> setup (hd0)
> quit
2. Create a 250MB partition where I installed refit and use rest of the disk for Ubuntu or FC13. After installation, both Ubuntu and FC13 halt at the same error.
3. gptsync fails with no refit installed. Finds GPT table empty. LiveCDs from both distros work fine so ruling out hardware issues like bad memory etc.
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Feb 27, 2011
I opened GParted to create a new partition on a new drive. He wanted me to create a partition table first which I did, and it was created directly without any prompt like im used to see when creating partition. So I recognized too late, that i actually created a MBR on one of my 6 1TB raid5 drives. Not beeing sure if the ne MBR was really written, I have opened ubuntu disk utility and clicked on the check raid button. It directly made a resync. After the resync, mdadm --detail /dev/md0 told me everything is ok and synced. Then I wanted to mount it with:
mount /dev/md0 /mnt Then I get the following error: "mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so" I think I just killed my raid5 ;(
I shouldnt work on my server when im tired and when I actually have no time ;( My last hope is the fact, that "Disk Utility" shows that there is a .0 TB ext4 volume on my raid (see screen below) [URL]
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Dec 2, 2010
I am travelling so would really appreciate a few tips that should hopefully get my pc running again. (I have internet access via a kiosk, and can burn a disk if necessary, but the smaller the download the better)I have a few ideas that with some help I should be able to fix the partition.1. Is there a simple way to use use grub, to mount all partitions read only and not to fsck them so I can logon in normal user and sudo and hopefully fix the parition?or 2. Download a small version of ubuntu or something that I can burn to CD (my machine cannot boot from usb) so that I can repair the machine.3. Download the ubuntu installer (alternative) and try and reinstall the necesary usr partition?
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Sep 8, 2010
I have a hard drive where one partition is used as part of a logical volume (LV) using LVM. The partition table is corrupted and prevents the partitions from showing as devices in /dev/. The corruption prevents the logical volume from coming on-line b/c LVM cannot find the part on the corrupted disk. I (am pretty sure) I know the block offsets and lengths for each partition on the disk but do not want to write to the disk in case I am wrong.
How do I go about recovering the logical volume in this scenario?
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Jun 15, 2009
I used to have a 1TB external drive with lots of stuff on it. But after a reported drive failure during a F11 install the partition table seems to have been lost. (I think F11 toasted it)
Disk /dev/sdc: 1000.2 GB, 1000215724032 bytes
255 heads, 63 sectors/track, 121602 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
[code]....
The drive used to have xfs and a partition. Is there any way to rebuild the partition? Or is my 1TB of data gone forever? The drives seem to be fine now... I just want to get it up enough to either pull any data or just to get a file list. Most of the stuff on the drive was from somewhere else.(ie 300GB of NRN data for all of North America.
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Mar 13, 2011
HP 6930 laptop
120GB HDD
It had Win7 64bit installed across the whole drive (100MB sys reserved and C: taking up the rest), I was successfully able to shrink the C: partition to 60GB. So I know have a working copy of Windows 7 on 60GB with 60GB or free space. I boot to 11.4, the installer works great so far and is real fast, I get to the spot where I choose my partitions for nix(tried both auto and manual) then I click OK at the warning to start writing to the disk and ....error 1007, the installer is unable to create the partitions.
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Sep 12, 2009
Just ran into an uncomfortable problem. I usually never save any documents on my machine, and keep all my stuff on an external USB hard disk. (an 80GB TrekStor DS microdisk q.u)
Well yesterday this disk just would not mount.
Read through related posts but nothing seemed to work. Even tried it on a Windows machine.
Tried TestDisk utility. Found nothing wrong with the drive, but still could not repair the MBR.log code...
Palimpsest Utility recognized the drive, but just will not let me do anything with it except format it.
How can i repair the partitions and MBR without losing all my data?
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