Debian :: How To Rewrite Partition Structure Without Deleting Any Data?
Aug 20, 2009
I'm pretty new to linux, and I'm facing a problem with an ext3 partition on an external hdd. I'm not sure whether the hdd is about to crash or not, however I've had a few problems accessing it in the past.
I have a second external hdd, the exact same drive, that has the exact same partition configuration, but holds different data. So, my question is; is it possible to backup the partition structure of the second working drive, and using this information to rewrite the partition structure of the failing hdd without damaging the data stored on that drive?
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Apr 7, 2010
I've recently installed xubuntu 9.10 and when try to delete a folder with many sub-folders, this is what happens:
dav@dav-desktop:~/Downloads$ ls -l
total 1266644
-rw-r--r-- 1 dav dav 243161797 2010-04-06 20:06
[code]...
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Jun 22, 2015
This is a continuation of the post in [URL].... . What has happened is that I have a huge log of 600 MB + and do not know from when the data is in there.
Code: Select all┌─[shirish@debian] - [~/.config/quassel-irc.org] - [9714]
└─[$] ll -h quassel-storage.sqlite
-rw------- 1 shirish shirish 647M Jun 22 21:15 quassel-storage.sqlite
So I need to know if there is a way to get just the first five or ten entries listed as one can do using head, tail etc. I did try just using head but it was unsuccessful. The second thing would be deleting some days, weeks or months data from the existing sqlite log. I did see URL... but in my case I am deleting old entries in the sqlite log and also do not know if sqlite makes backups of the data or not ?
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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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May 17, 2010
Now, I use Fedora Core (version 8) with core linux OS 2.6
I have some file data with size about 2G and I want to burn (write) this file to DVD rewrite.
I know linux OS can install software to burn data to DVD, but I don't have permission to install more software. I only use command line over Terminal (Gnome Terminal).
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Oct 1, 2010
I have a mxn matric (which is my simplified way of saying it is RAM with bytes on it) Some of the locations on this metric is filled with some data and some places are empty. The mxn are very big numbers in size. I am trying to make a program so that if a system call wants to write some thing on empty locations on this mxn metric it should be able to do so without any problem. The thing which I want to understand or logic of a data structure is what data structure do you people feel should I be maintaining so that I can allocate the requested space immediately from the above mxn matric when some system call requests for some (k) number of locations from above metrics.
The logic initially I thought was to maintain a hashtable
1bytes requested----------> location 1,location 2,location 3.........location n
2bytes requested----------> location 1,location 2,location 3.........location n
3bytes requested----------> location 1,location 2,location 3.........location n
[code]....
but the problem with above logic is size of the pointers where I will be writing this problem is unsigned 64 byte.So to know location of one free byte if I am maintaining one pointer of type u64 this is not a feasible solution.
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Nov 15, 2010
Options:A double linked list with fixed size character arrays. New nodes will be added when previous ones get filled. Dynamic arrays using realloc(). Linked list has the disadvantage of not having an O(1) search like an array but I think using realloc() will be more dangerous since it moves the whole block to a new location and if the new location is not big enough to hold the whole block, realloc fails !! this case will not occur with the linked list since its nodes are scattered.
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May 25, 2009
I am writting a program that reads a text file (music.txt) & stores it in a Data Structure. I am a novice learning over the internet so I this is something I have never done. How do I do this?
Quote:
Write a program that reads the data from the music.txt file and store it in a data structure. To implement this data structure you must use an array of songs and each song must be represented by a struct with appropriate fields. So far all I can do is open to file to read it (very simple I know) but so far is it correct?
Code:
#include <iostream>
#include <fstream>
#include <strstream>
[code]....
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Jul 22, 2010
What is the best and simplest way to compare two directory structures without actually comparing the data in files. This works fine:
diff -qr dir1 dir2
But it's really slow because it's comparing files too. Is there a switch for diff or another simple cli tool to do this?
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Dec 4, 2010
We want to fix our data folders structre in Samba, for example our folders would be like as Data/Group A/2010 /A.We want all our users can work only in folder A and no one can create any files in data, GroupA, 2010 folders. Similarly no one can delete these basic folders. However users can create further folders in A as required.
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Apr 2, 2010
Does anyone know of a C Language Data Structure Tutorial? I have not been able to find anything much to speak of myself.
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Oct 9, 2010
I started withsda1 windows restore sda3 extendedsda5 swapsda6 /mandrivasda7 /SUSE 11.3
sda8 /SUSE 11.2I then made some changes with gparted (from PartedMagic 5.5) to create an ntfs partition to simulate a condition where someone may want to delete that partition and use the free space for linux. I then deleted that partition, sda2 then sda5 (swap) and taking some screenshots, went about resizing partitions to use that free space and then recreate swap. the intention being to create a basic guide on how to go about this.I have previously only had my swap at the end of the extended partition, deleting itand recreating it later had caused little trouble.I realize that a resize/move operation would have been a better choice.What I was not expecting was the partition number changes that occurred.
Code:
root@PartedMagic:~# fdisk -l
Disk /dev/sda: 80.0 GB, 80026361856 bytes
[code]...
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Jun 21, 2010
I am in deeply need of queue (linear data structure) in shell script. How can I implement this ??
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May 18, 2010
identify the right network structure for a data intensive website, built on LAMP. I'm thinking of a load balanced website, and that it should have a mysql master/slave setup server. I'm no expert in this area, so any online resources are welcome. You can check out the website [URL] - but it will have 10 million items once the hardware can support it.
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Mar 18, 2010
Is there any way to install ubuntu on a drive without deleting the current data on it:
I have a software raid array set up and it has a few folders in it like /rtorrent, /cod4, but nothing that would conflict with a new ubuntu install.
And its formatted as ext3
Is there any way I can install Ubuntu Server 9.10 onto that raid array keeping it INTACT as a raid array AND preserving the data on it?
And is it easy to boot from a software RAID array?
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May 16, 2010
I was trying to delete a logical drive in windows xp and the damn disk management tool in windows not only deleted my other windows partition but also my linux /data ext3 partition. Now I have a unallocated space in place of these partitions. The data is still there but the entries in the partition table have been removed. So how do I recover my partition. I was trying to use the following tutorial. [URK]
I used the sudo parted /dev/sda -- and then rescue START END command and could get back the /data partition. But it gives me the following error while mounting the partition. mount: wrong fs type, bad option, bad superblock on /dev/sda7, missing codepage or helper program or other error. In some cases useful info is found in syslog - try dmesg | tail or so.
What does this mean. How to I fix this? Also when I try to recover my windows partition using parted it scans for a while and then does nothing. It doesnot ask for writing the lost partition in the partition table. What do I do?
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Jun 1, 2010
I had to recently reinstall ubuntu because 10.04 started acting up on me. I reinstalled 9.04 but I don't know how to mount my RAID drive without messing with the data that's already on there. I have the UUID for the RAID but fstab isn't able to find it. I also previously used RAID software but I don't remember which one I used. how to mount my drive so that ubuntu can see it?
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Jan 10, 2011
I copied a back up of my windows 'my documents' fold and all of its' sub folders into my linux (Mint Debian) Documents directory. I found that many of my files can be found in more that one directory so, what I want to do is to find all the dups and deal with them. Is there a good linux application to resolve this 'duplicates' problem. (I don't want to touch the linux system files.)
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Aug 30, 2011
I am currently running a dual boot machine with Ubuntu 11.04 and Windows Vista.Is there any way I can delete the Linux partition and Grub boot loader without affecting the Windows partition at all?I would also like to be able to repartition all of the space that was previously occupied by Linux.
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Dec 9, 2010
Old drive is dying, so I copied the system over to my new drive. I've moved /home and /tmp to separate partitions and updated fstab and grub with the appropriate UUIDs from blkid. Grub wasn't loading but that's been fixed now.
Problem:
The problem now is that when I boot I get the following screen:
Errors were found while checking the disk drive for /
Press F to attempt to fix the errors, I to ignore, S to skip mounting or M for manual recovery
F doesn't work, and in manual recovery the file system is read-only. How to proceed?
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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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Feb 25, 2010
What are the advantages of the multiple partition setups other than resistance to data loss in crashes? Is there any other reason to have a special partition just for your boot directory (kernel files and config) than surviving a major crash?
Also, is it possible to make the Debian installer accept an existing set of partitions? Or even alter the size of the automatically created partitions? Does expert mode let you control the partitions? How many other very detailed things would I have to know to use expert mode, though?
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Feb 23, 2010
If i have ubuntu dual-booted with windows already, and wanted to get rid of windows entirely, how would i delete its partition?
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Sep 6, 2010
This is frustrating, I just can't wipe out the HD on the Fedora 13 live CD.. When I open up Disk Utility, it says something about the resource being busy.. It seems that it's the swap partition, the live CD is using the swap partition, and I just can't wipe out the HD.On Ubuntu live CD, I can go to GParted, and tell the swap partition "Swap Off", but I can't seem to do that here.. I tried to add Gparted while in the Live session, but the Authentication button does nothing at all..
Is there a terminal command to turn off the swap partition so I can format the HD completely?(I'd also like to try and install without LVM, for my laptop it's just overkill and wastes HD space).
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Apr 4, 2010
I have deleted the ubuntu partition on my xp pc. Now at restart i have the following:
GRUB loading.
error: no such partition
grub rescue>
I have no idea what to do now. I have downloaded super grub - because one of the pages that i googled said it would help - but my pc does not read from either the cd or usb drives - don't know why.I need this pc recovered today .
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Jul 17, 2009
I have a Windows Vista machine on which I selected "utilize free space on selected drives" to install Fedora 9 temporarily. Now, however, I'd like to remove the Fedora installation. I've tried using fdisk from the Fedora 9 rescue mode on the install DVD, but I seemed to merely mess up the cylinder boundaries. When I boot from the DVD, before entering rescue mode it says that /dev/sda contains a looped partition, and asks whether I want to reformat it (completely removing everything on the drive).
How do I remove the "looped" Linux partitions? (I cannot login to Windows, so any GUI applications won't be any help.)
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Oct 17, 2009
I have my hard drive partitioned into 3 partitions with one operating system on each partition, as follows:Windows XP
Windows 7
Slackware 13.0
I want to delete the Windows XP partition to free up space on my hard drive, but I'm afraid that it will corrupt or delete the LILO bootloader and prevent me from loading either of the other 2 operating systems.What should I do? Can I save and restore the bootloader and its configuration somehow?
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May 26, 2010
My cousin just deleted his Linux partition and another smaller partitio nand now Windows is not booting, no he does not have the recovery disc. When Windows tries to boot it goes to "GRUB" and says "partition not loaded". What are some GRUB commands? And is it possible to fix this without using the recovery CD?
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Dec 29, 2010
I tried to install ubuntu on exernal drive and install grub there. But no joy. I had to do on primary master.
Now grub shows 2 linuxes on machine, which is a pain, since I cannot boot this other install on external from grub.
I am trying to delete and create that partion with gparted. But won't delete it, even after unmounting it.
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Jan 20, 2011
I have two 500gb hdd. One of them crashed (the one which i used windows on) and its now getting sent to the warranty people. On my other hdd i do not have any OS installed, it's just one 500gb NTFS partition, i have there just some personal important stuff. I want to install ubuntu 10.10 x64 on it. I understood that when i will do this, from the available free space it will be created a new partition.
I have tryed to get along with linux a few years ago and i failed... Can you tell me if i will be able to delete the partition ubuntu is creating and merge the unpartitioned space back to NTFS without formating the drive? Also how big are the risks of losing my data when i try to install ubuntu and when i will try to go back to one big NTFS?
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