General :: Cloning PC Image To External - Read Error
Nov 2, 2010
I have a pc I want to clone and it has 2 partitions sda1 which is vfat and sda2 ntfs. When I had mounted my external hdd it was seen as sdc1 and my Knoppix boot as sdb1. I tried using the following command to copy the pc image to my external but when it gets to 26Gb it gives read error.
mkdir -p mybackup
mount -t ntfs -o rw /dev/sdc1 ./mybackup
dd if=/dev/sda of=./mybackup/780.iso bs=4096 conv=notrunc,noerror
Where am I going wrong? Is there anything wrong with my above commands?
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Apr 13, 2011
have a binary image that I can copy to a partition and have done so successfully in the past. The image is smaller than the partition size, and everything is all good. However, I noticed that in copying the 5 gb image to the 9 gb partition there are 4 gb that are unnoticed by the system. It still registers the partition at the correct size in Gparted and Disk Utility.
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Sep 1, 2010
what is the best software for cloning my centos as an exact image?
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Nov 7, 2010
I just invested nearly 12 hours configuring a CCTV system using CentOS 5.5 Server and Zoneminder. I have it setup just the way I want it. I would like to make a clone image of the drive just in case disaster strikes (lightning strike, failed hard disk, etc). In the Windows PC world, I use a program called Ghost to make a mirror image of a hard disk. I power the computer down, run Ghost to make a block level clone of the drive, then power it back up. Can I assume that will work with CentOS without problem?
In the computer now is a 320GB SATA drive. One partition on it is swap, and the other is ext3. There is no raid setup on the drive. I have an identical 320GB drive I could use and keep it in the computer unplugged from the power and not spinning. That way if anything ever happens, I can power down, move the power and data cable to the new drive and power it back up. Granted, I will lose any new config and database changes, but it will be a lot better than starting back at square 1 and reconfiguring the entire OS and software.
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Feb 17, 2010
In the past, I have used dd to replace (as well as overwrite) hard drives.
If you do a direct clone of a drive, you are supposed to make sure the target drive is the same size as the source drive.
It is quite important that I am able to clone a failing drive (250GB), however, my only other drive available is a completely new 1TB external hard drive from a different manufacturer.
Is it still possible for me to safely clone the failing drive? If yes, how would I go about doing this? Make a 250GB partition on the 1TB drive?
If I use the TB drive as a "temporary backup", and once I have copied over with dd burn everything directly to DVDs, and then restore the TB drive to it's original state, will this be able to be done?
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Jan 14, 2010
I need to backup my active production servers (yeah it's too late now) with image cloning application that were running RHEL3-5. The problem is I need to run it remotely from my office. Most of the software I found either need to use bootable cd or need to unmount my partitions which is I wasn't allowed to since it's a production servers. I also tried dd but it consume too much time, sector by sector cloning and empty disk space also included so the file created also big in size.
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Sep 26, 2010
I just created a NTFS image file using the following steps:
After this i want to access the contents of this image file in windows. How to do that ?
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Aug 21, 2010
I was in the process of backing up data from my hard drive to an external usb drive when the drive suddenly became read only. Does anyone know how I can make it read/write again? I am using Debian Lenny and the drive is ntfs formatted. I have another ntfs formatted usb drive that is not effected in this way.
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May 4, 2010
I'm using Xorg 7.5 on a Radeon HD4870 with the FOSS radeonhd server on my HP 6830s. The laptop has a VGA connector and I attach it to a 37" panasonic plasma TV. It works fine except for a little annoyance: when activated, the TV screen is set to the resolution of 1360x768 (which it reports as being the highest it supports) but all the image is shifted by about 100 pixels to the right. I can't see the leftmost part of the page, and I have a black vertical bar to the right.
If I change the resolution to 1024x768 there is no shifting, the image fills the entire screen with no parts hidden, but at this resolution the image is stretched. How can I tune the position on the external monitor so that the image is centered in the screen filling it entirely?
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Mar 16, 2011
I administer a remote server via SSH that runs CentOS 5.5. I have been unsuccessful in all my attempts to write to two different external USB hard drives with a single ext3 partition when logged in as root.
When attempting to create a "test" directory I get one of two messages:
Quote:
Both drives *appear* to have filesystem issues. When I run an fsck on either drive, I get:
Quote:
Keep in mind this is a newly-formatted, empty drive.
Not putting stock in the odds that I've had two hard drives (different sizes and brands) with the exact same hardware problem, I'm going to assume this is a software issue, although maybe it isn't. Hence, my post in "Linux - General". I've heard talk elsewhere of controller (chipset) issues coming into play. Is this valid?
Okay, here's the information you'll need to make a diagnosis....
Here's the output of a "df -h" command:
Quote:
Here's the contents of my /etc/fstab:
Quote:
Here's the output of "cat /etc/mtab":
Quote:
Here's the output of a mount command:
Quote:
Here's the output of fdisk on the device in question:
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The number of cylinders for this disk is set to 48641.
There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK)
Command (m for help):
I've got someone with access to the box if necessary. But it might take days to implement solutions since this isn't his full-time job. Remote solutions are, therefore, preferable.
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Dec 16, 2010
i borrowed an external hard drive from my friend to back up a load of stuff on my windows partition before reinstalling it. I am doing this through ubuntu. I am trying to zip up folders like My Documents etc and chuck them on the external hard drive but it always comes up with errors to do with read/write permissions. In the permissions tab on the folder properties of the ext hard drive it says I am owner but i have no file access (only folder access is create and delete files). When i try to give myself read/write permission it just goes straight back to nothing when i look at it again.
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Oct 7, 2010
I try
mount -t ntfs -o rw /dev/sdb1 /mnt/exthdd
it doesn't give me any response so I presume it succeeded but when I try to touch it, it tells me it's a read-only file system
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May 22, 2010
I initially thought the problem had to do with the Lucid Lynx upgrade, a lot of people have been reporting similar issues with drive mapping and things along those line. My issue is that an external drive, formatted in FAT32 appears to be corrupted, and overtime begins to read or mounts as 'read-only.'
What I've read, and deduced, is that this is ultimately and issue with the drive. I've backed it up, reformatted, and been able to write to the drive successfully, but I've been moving a lot of files (backing up) and the system has been reporting input/output errors in transferring some files (through the GUI).
The only thing I can think of, is that the device itself is corrupted or damaged, and that I need to be thinking of other back-up options for the future. Any suggestions on disk-doctoring? I'm hoping to do a clean-install of the OS once I back up my files manually.
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Feb 13, 2010
I used proprietary software (acronis trueimage) to clone an Opensuse 11.1 machine, onto another machine with somewhat distinct hardware (different motherboard, less memory). I expected to have to change entries in /boot/grub/menu.lst, /etc/fstab, etc. I was told a good way to do this was to use the Opensuse DVD's "repair installed system" feature.
When I ran the repair, I was informed that "bootloader configuration file contains errors". I attempted to re-install the bootloader, but received this unhelpful error: "An error occurred during boot loader installation. Retry boot loader configuration?". When I boot the system, I just see the text "GRUB ", followed by a flashing underscore character.
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Mar 15, 2010
I have a problem with my external hdd, I mounted it manually and in the mount table it says ive got rw permissions. But when i try to change permissions it says:
chmod: changing permissions of `whatever': read-only filesystem.
This is my mount table:
[root@localhost ExtHDD]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
[code]....
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Mar 24, 2010
I've had a look at some similar threads but as I'm very new to linux they're already a bit technical for me. Sorry, this calls for someone with patience. I gather from other threads that disconnecting an external drive without unmounting is a no-no, and this seems to be the likely cause. Now the disk is read only and I'm unable to change any settings through the usual control panel on ubuntu. I'm just not familiar with the terminal instructions. I tried to cut and past a few command lines from other threads but I got some warnings that proceding could damage data. Like this one: WARNING! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage.
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Jul 8, 2011
I am new to Linux. I have installed RHEL 5.4 on my PC with preloaded Windows XP.
Windows was set as the first boot kernel. So if i do not choose which OS to be loaded it will load Windows by Default.
Today I got an error saying GRub Loading Stage2 read error.
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Apr 3, 2010
I am using opensuse 11.2 kde 4.4.2 . I had a working installation of sun virtualbox 3.1 with its virtual image on an ntfs partition before upgrading kde, then I upgraded from KDE 4.3 to 4.4. Now when I start sun virtulabox it gives an error stating that it cant access my hard disk image file due wrong permissions and that the image is read only. I cant create a new image on that partition due same problem but I can create one on my home partition.
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May 20, 2010
I am using RHEL 4.4. Last time when I reboot my server it generate an error, and mention to run fsck command in repair mode. When I ran, this fix some problems, but after that it generate an error of gdm and X11 services after showing login sceen and getting user name and passwod. But I login via putty from a remote system. So, when I tried to make changes like create directory or file or even tried to make any change in any file it generate an error that " you can not make changes in read only file system".
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May 6, 2010
There is this server that I have just put with Bugzilla. It needs Image::Magick module for rendering bmp or other image types to png to save some disk space and compress the images.
The best way to install it is using CPAN repos. And it gives whole lot of errors. I am attaching the file for errors.
But if try to install from cpan console it says Image::Magick is already the recent version.
Code:
And this is the bugzilla error:
Code:
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Dec 17, 2010
I have just assembled my computer and installed Fedora 13. After rebooting I get Error 25: Disk read error, Press any key to continue. When I do that the systems goes back to the GRUB window where I continue to press enter and it goes back to the error after a while.
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Jan 4, 2011
I regularly rsync directories to an external usb drive. Recently I've started getting errors which look:
blah blah:Read-only file system (30)
The external usb drive has two partitions (ext3 and fat32) and I rsync to the ext3 one. The rsync command is
rsync -ahi --delete /home/mike/some_dir /media/usb_drive
People have reported this error with faulty usb cables but everything was working fine until recently so it seem unlikely a usb cable would suddenly wear off.
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Jun 7, 2010
I had my server going pretty good. Two sites being hosted. Wilmingtoncoc and Mikealrhughes. Last night we had Thunderstorms and Tornadoes come through. While I was out Tornado chasing. We lost power here for an instant and back on. When I came in the server was off. So I booted it back up. The mikealrhughes site is still working good. The Wilmingtoncoc site is giving me a Database read error, it is a WordPress site. Also I can't log into the Server using SSH. Where do I start to repair the problem? Do I reinstall SSH if so what is the command I use? Then how do I solve the WordPRess Database problem? Also when I try and issue a command from the Server with sudo in front of it I get an error message that says - sudo: must be setuid root - whatever that means. I couldn't find that in any of the books I have.
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Aug 8, 2011
I'm having an issue running a CD via external CD/DVD player (LG portable super multi-drive)
My netbook is: eee pc 1005P Im running: Ubuntu netbook remix 10:10
I've tried the following:
Quote:
run
Code:
sudo mkdir /media/cdrom0; gksudo gedit /etc/fstab
add this line:
[Code]....
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Apr 6, 2011
Yesterday, I bought a 1TB WD Passport, for backup and storage. It uses NTFS, and I've had no problems manually mounting and moving files to and from it from root. However, I don't like having to be root to in any way modify the data on the drive. In order to avoid this I decided to create a line in fstab that would allow permissions to the user, so I added this to my fstab:
Code:
/dev/sdb1/mnt/external ntfs defaults,
noauto, noexec, user, uid=1000, gid=users, umask=0022, nls=utf8 0 0
This allows me to mount, unmount, and peruse the external HDD - however, if this is active, neither the user NOR root have permission to make any changes. The HDD acts as read only, even though there is no "ro" option on my fstab.
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Jun 16, 2011
Oooookay, so basically the idea I have is that I would like to boot Windows XP over an AoE connection. This is no issue, however the problem comes when I want to have a single, read-only image as the base image and want to be able to boot multiple computers off this image.Licensing issues aside (let's assume that this complies with all licensing issues, or we can think of it as just a conceptual "how could we do this"), the basic issues are thus:Each boot of Windows will require a writable AoE device...The original disk image must be read-only to avoid changes in 1 boot affecting all boots(As far as I know) The AoE device must be a disk image, or some block device rather than a mounted file system (if this is not so, aufs could be used)So the long and the short of this, from what I can tell is that we need a read only device that we can write to.
At the end of a session, the changes to the device will be discarded, so these can be thought of as simple temporary sessions. This means that there is little concern with having changes to the original read-only image effecting the modifications to the "duplicate" images.
I would like to avoid duplicating the image for each instance, however if no solution can be reached then this could be a possibility (every boot, we can copy the image, give the fresh image to the new boot and remove when done)Optimally, changes to the filesystem will be written to a different filesystem (much like what aufs does, however as stated earlier, afaik aufs only deals with 2 mounted file systems, whereas we need the end result to be an image or block device)Sorry if I havn't explained this particularly well, however I've been trying to think of solutions, caveats and generally how to define the problem as I was writing. If you think that this idea is ridiculous because software x handles the problem better, I'd be very pleased to hear about it, but the basic requirement of temporary, network bootable windows xp sessions still applies.
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Sep 9, 2010
I have a computer in the university and I have root access to this pc. Iam trying to install Cblas library on it. But it gives me a starnge error /usr/local/atlas is read only file system. I tried doing mount -l and it gave me that appserver1:/export/d1/Linux/doe on /usr/local type nfs4 (ro,sec=.......) I think what it means that the main server directory is mounted to /usr/local and it is read only. So, how can I fix this problem to separate the two and make my /usr/local separate
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Jun 15, 2010
I'm having problem copying files from my laptop (windows xp) to moxa (linux) using ftp.
The error im getting is "533 read only file system".
Tried reboot and fsck but problem remains.
mount output below:
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Feb 8, 2011
I am using Wind River Linux- 2.6.27.18-WR3.0bg_standard. The problem is whenever I execute "reboot, ls, cd" and many other commands the OS prompts me an error-
"end request: i/o error, dev sda, sector "(different sector each time)" and
EXT3-fs error (device sda1):ext3_get_inode_loc:unable to read inode block- inode-4088001, block-4097027
I also executed "dmesg", it also showed similar errors. Has the disk gone bad or the kernel is corrupted?
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Jul 4, 2011
Been happily going along with Lucid Lynx, locked in, no problems. Slowly sorting through many files on an external 500 GB USB drive, moving into useful sub-folders. Today, I cannot write to any folders on that drive -- read only. ?!?! I run nautilus as root, still no joy. (Using nautilus GUI to browse files to move to other folders.. how can I change these settings to allow me to be able to write to this drive again?
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