Ubuntu :: Rebuild Partition Table Or Create RAW File?
Jul 12, 2010
I need to be able to access the files on the image of a hard drive created with ddrescue. The original drive had bad, unreadable sectors, and was corrupted in a way that damaged the partition table. It was formatted NTFS, but because of the corrupted partition table, nothing recognizes it as such anymore. Is there some other way I can mount it, rebuild the partition table or create a RAW file tree out of the image file?
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Dec 14, 2010
I need to find a program or a way to edit the partition table and set the values and addresses for the partition boundaries manually. A while ago I had a very messy data loss that left me with a disk full of data but without a partition table (and without file indexes for some of the partitions on the disk). So, for recovery reasons I need to try lots of combinations of starting and ending addresses for each partition. Additionally it would be extra nice if I could do this with a live cd since I don't have the faulty drive attached to a working computer at the moment.
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Oct 28, 2010
When using the gparted option to create a new partition table does this automatically create a new mbr?
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May 20, 2010
Can it be done? If so, how? As far as I know it doesn't work like mkfs.ext3 and all that.
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Jul 27, 2010
I have a problem with one hard disk,now it says its Unallocated,and i tried to create a new partition on it,but it says that first i need to create a partition table,but when i create one,choosing msdos label,it doesnt to nothing. I used Gparted in Fedora,how can i create a partition table,so i can use my hard disk again?
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Apr 6, 2010
I have an unallocated space at the end of my hdd, which is about 10 gb. I installed Pardus on that space, but then deleted the partition to install something else (I know I did not have to delete it, I could simply install the new thing over it), i dont remember exactly how, but it was from my Debian System, not from a LiveCD.Now, I am unable to use that space. GParted gives an error and says:Warning: the kernel failed to re-read the partition tableon /dev/sda (Device or resource nusy). As a result, it may not reflect all of your changes until after reboot.
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Aug 6, 2010
Is there a difference between using GPT partition table when formating hard drives and MS-DOS partition table? What are the advantages/disadvantages of using either?
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Jan 26, 2011
I have tried to automate the configuration of a usb drive with not much success.
The problem that I have is that I have a large amount of usb drives that have a partition table of type "loop" and I need to change them to "msdos". The size of the drives vary and I need to use FAT32 or FAT16 file system.
I've tried various partitioning commands and gui applications but cant find one that I can give a one line command to to set the partition table, maximum partition size and file system.
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Jan 19, 2010
I was trying to perform a new install, so sensibly made a back-up of my data to my external drive. Unsensibly, I didn't unplug the disc before starting the install and the install trashed the partition table/FAT on the external drive.I've used disktree and can "see" that the disk has lots on it, but I cannot access it.
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May 5, 2010
I'm trying to define the partition table type (I want to set it to msdos) for an automatic installation using preseeding file. (Why? I want to setup a software RAID 1 with two 2TB disks, by default the installer uses gpt partition tabless on those disks, where it's tricky to install grub(2), as there is no mbr, and the root partition is on a md device) During manual installtion it is possible to set the partition table type (by setting debconf priority to low).
[Code]...
Does anyone know what I have to put in my config file so that a msdos partition table will be created Also any other solution is welcome. I just want to have my root partition on a raid 1 and have grub installed, so that it boots up (No other OS is installed on the boxes. Debian squeeze is used)
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Aug 23, 2010
In an attempt to shrink my Data partition on my 500GB drive I had succeded in shrinking it but I think I have broken the partition table as now it refuses to mount. When trying to mount I get this error mount: wrong fs type, bad option, bad superblock on /dev/sda2 I have done some searching around but most fixes haven't worked because they are based on ext2/3 File systems and this partition is ext4. Using Ubuntu 10.04 x64.
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Mar 27, 2010
I want to change my sda2 partition to ntfs type. i have installed GParted but it is returning a strange type of error. Here is the error dump file...
[Code]...
WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes until after reboot. WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes until after reboot.
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Feb 5, 2010
Is there a program that will reread the partition table and update the kernel even if one of the unmodified partitions is mounted? I installed my system on one partition, then I added another with free space. Now I want to format the second partition, but the kernel doesn't know about it yet. I tried sfdisk -R /dev/sda, but it refuses while the root partition is mounted. Is there anyway I can avoid rebooting?
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Oct 5, 2010
What I believe has happened is that I've corrupted the partition table. Essentially one of my partitions' ending point exceeds the maximum number of cylinders/sectors on my drive.
Essentially I have the same problem as on the thread @ [url] but do not know how to fix this and am afraid to reformat/partition based on sectors without really knowing what I'm doing here.
[code]...
When I try to look at SDA in GParted everything shows up as unallocated (though it's obviously not) and it says
[code]...
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Jul 29, 2011
In my efforts to resize my BTRFS Partition, I accidentally unmarked my BTRFS partition as being BTRFS, and can't mark it back as I can't find the numeric ID for BTRFS and how to apply.
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Jun 15, 2010
I've got 2 hard disk drives of 250GB, with this partitions :
All partitions are with format "linux raid software". I made 3 raid1 with them like that :
I want to clone them to news hdd of 500Gb, to have this partitions :
My problem, how can I resize partitions, before resize the array md2 with the command mdadm --grow /dev/md1 --size=max ?
After, how can I rebuild /dev/md2 without lost any datas ?
I'm using ubuntu-server 10.04 64bits.
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May 20, 2010
I was installing opensuse 11.2 in parallel with windows xp.but during installation suddenly power has gone and after that opensuse is giving me the error message corrupt partition.i am also not able to login in xp. so I decide to reinstall windows, I got the error saying "invalid partition table" after the first restart of windows xp installation.
I tried to use windows system recovery console and committing fixmbr and fixboot commands, but didn't work.
i have 2 window partition(1 for windows and 1 for data).i do,nt want to format 2,nd partition.
How can I installed windows?My plan was first to install windows xp, then opensuse again.
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Feb 8, 2010
I was reading another thread about someone with a bad partition table and I decided to join this forum. I'm not going to take any drastic actions with the partition (/dev/sda3) in question. I am going to wait for instructions on what to do first. I am not very good with Linux and need some hand holding. System: DELL 4550 Dual-Booted with XP and Ubuntu. Works OK, just no swap. Well, here's what I did: I deleted a partition for Windows XP Pro because it was a trial, and it ran out. I then decided to slide the swap partition for the Ubuntu Linux that I dual-boot into over. (If this was successful, I was going to try expanding the root partition to take up the unused space.) I used Gparted on a CD to do this, as I figured it was safe to do.
I now cannot mount the swap space at bootup (and have to go into a backup version of the OS), although I can use Gparted in Linux to execute the "swapon" command, and it appears that it worked because I now see "swapoff" as an option on the context menu. (I actually don't even need a swap partition, except to hibernate.) If I highlight the swap partition and click on "Drive" on Gparted's menu bar and select "Create Partition Table", it will erase all data on /dev/sda, so how do I fix the bad partition table non-destructively?
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Apr 24, 2010
Everything is installed and setup on my system, but when I setup my partitions I chose my Windows partition to be bootable. Can I just use cfdisk to toggle the bootable flag so my linux partition is bootable and rewrite the partition table?
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Feb 17, 2011
USB flash disk partition disappeared as well as partition table I'm not sure about the cause
Code:
root@u# less /var/log/syslog
usb 5-1: New USB device found, idVendor=058f, idProduct=1234
usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[code]....
Where did the partition table go? The device had one ext3 partition something around 4GB(size of USB storage device). I need to restore few files from this device.
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Nov 19, 2009
I'm trying to clone a Linux install to a different laptop. It's made a little complicated by two facts:
1) The 'new' laptop I'm trying to copy my Linux installation to is actually older and has a smaller hard drive then the computer I'm copying from
2) The computer I'm copying from has both a windows and Linux installation; I only care about the Linux partition.
I figured I would copy only the Linux partition from my primary computer to the laptop, sense the laptop doesn't have a large enough hard drive to copy everything. So I used the DD commands to copy SDA3 (main Linux partition) from my main computer to SDA2 of my laptop. When I came back a few hours later I was surprise to find my laptop trying to reboot itself (I never turned it off). It would keep starting to reboot, failing, and restarting itself. Not too surprising sense its boot partition wasn't changed so it's trying to boot into centos when I copied a redhat partition to it.
The problem is that when I used a redhat boot disk the rescue mode was unable to find a Linux partition to mount. /dev/sda2 exists, but trying to mount it gets the complaint "No such file or directory". "fdisk -l" lists sda1 (the boot sector) and sda2. Sda2 is the correct size and reports Linux LVM for its system. But "fdisk -l /dev/sda2" gives the error message "Disk /dev/sda2 doesn't contain a valid partition table" Did I not clone the drive correctly, or was an error caused due to the boot sector not being copied yet (the laptops boot sector is smaller then my old computers, so I can't copy from old computer to laptop)? Can I salvage the laptops partition table somehow, or do I have to repeat the cloning process? And if I do have to re-clone my computer can anyone tell me what I did wrong the first time so it works this time? I don't care if I copy just the Linux partition or both windows and Linux. Even though my main computer has a larger hard drive I'm only using about half of its available space so it should be possible to copy both partitions if I could ignore the unused sections of the harddrive.
Edit: I used DD to copy a tiny part of the Linux partition from my laptop so I could look at it. Most of it is illegible binary of course, but I scrolled through till I found some text right near the beginning:
Code:
VolGroup00 {
id="F2MWxh-....-BidcLe"
seqno = 1
[code]....
So it seems that the DD command did copy everything over to the laptop, which is good to know. I noticed that it says device="/dev/sda3" right in the middle of the code I just posted. The Linux section of my original computer was SDA3 but I copied it to partition SDA2 of my laptop. So is the problem because the boot partition is for the wrong device? I don't suppose if I modified that one line to say SDA2 it would be able to load correctly? (Not that I know how I would modify the line, short of using the DD command again).
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Jan 26, 2010
I am sitting in front of an Ubuntu which was installed previously by someone else. How can I find out if a swap partition was defined?Is it always a swap partition or only a (ONE) swap file (like in Windows XP) ?If there is currently no swap partition: How can I create one and tell Ubuntu to use it?How can I conversely tell Ubuntu NOT to use a separate swap partition but to use
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Jan 16, 2011
new partition is sda or,hda i bit confusing here
my system ------------------
/dev/sda1-c drive
/dev/sda5 -d: drive
/dev/sda6 -ubuntu 10.4 partition
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which partition do i need to make tell me the commands for ubuntu 10.4
i tried 'fdisk /dev/sda3' but it is show unable to open,thing is iam confusing my quetion is i want mount one file system with name hda5/other to this new partition 'mke2fs -v /dev/[xxx]'---command for to mount file system xxx(here hda5) to that (new partition) partition
how to do
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Nov 21, 2010
When trying to rebuild a RAID1 on a FastTrak TX4310 controller after a disk was replaced the below message is given:
Code:
[root@SAMBA Samba]# dmraid -R pdc_gigcjhdfa /dev/sdc
Volume "pdc_gigcjhdfa" is not in rebuild state (current: 16)
Rebuild: cannot rebuild from current state!
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Dec 7, 2009
I have decided that my partition table does not meet my needs Barrymore, and I want to shrink the "/" partition by 80GB, and then create another file system on that space. I did some research on-line, and I'm not sure which way is the easiest and more secure way to perform the change with out putting the "/" file system on risk.
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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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Jul 13, 2011
I've started a webserver at 127.0.0.1:**** I want to be able to use a database for this server. Which schema do I use to add a new table to? Do I create a new Schema altogether?
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Jul 3, 2011
I don't know anything about that panel.It appears in different shapes, like a stand or table and all launcher icons will be standing on it.In some videos, some animated character moves on it from one side to other.I saw it in few tutorial videos and photos.Please tell me what is it called and how to create it???and also please mention any safe sites to download theme packages.I tried to download, but I am unable to install them
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Feb 24, 2009
What is the use of UNION=() in CREATE TABLE?
Code:
ENGINE=MRG_MyISAM DEFAULT CHARSET=utf8 UNION=();
I have been given some code and could not explain why it's err's out. Checked the mysql 5.0 manual but nothing[URL]. It only explains using UNION in a SELECT statement which I understand. If I drop off UNION=() then CREATE TABLE works fine.
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Jul 18, 2011
I originally had an Ubuntu partition on my hard drive which occupied about half of it. I installed Windows 7 in the remaining unallocated space and I was planning on doing a grub update from a live cd afterwards. BUT when I looked at my partition table, the space where the ubuntu partition used to be is now unallocated space!
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