General :: Implications Of Bad Blocks When Reinstalling A Disk Image

Mar 17, 2010

Let's say I'm using one of those PCs that uses a SSD flash drive in place of a more regular HDD.

Say I burn my favorite .iso distro and install it on this PC. I install my favorite applications and seek out and install any missing drivers and generally tweak the system like you do. When I am finally happy with it, I make an image of this installation to an external USB drive.

Now, say 9 months later some of those SSD blocks have gone bad because they were erased too often. They're no longer usable. Also, because I'm a sloppy person who can't be bothered to delete redundant stuff and run make-cleans and so forth, the disk is getting pretty cluttered and takes longer and longer to do stuff.

I decide the obvious solution is to remove and save any data I need to keep, then just over-write the disk with the image I made 9 months earlier.

The question is: will the firmware be smart enough to re-map my incoming image to avoid these bad blocks on the SSD? Or am I going to wind up with some parts of the image being located on bad areas of the SSD?

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General :: What Are Implications Of Using 'noapic' Kernel Parameter?

Aug 4, 2010

I recently enabled noapic on my laptop because it was experiencing strange input freezes on several distros that I tried.Ok, so it does not use the ioapics. My question is, what does this mean for the system? If it used apics before, what happens now? I am a freshly graduated computer science major, and I have worked with basics pics on projects before, but I am curious how this effects the running system.

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Hardware :: Should Use Disk With Report Of Bad Blocks

Feb 4, 2010

I'm setting up a mysql replication system. I usually maximize what's left on my stock before I buy. I do badblocks first to all 2nd hand hard drive to make sure it is in good condition before I install an Operating System.

I pick up a 200GB sata hard disk in the stock room and test it using badblocks. I left it in the office doing the test and just check it tomorrow. When I return to check, the report says it found 30 bad blocks.

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Software :: How Many 4096 Byte Blocks On Disk

Aug 13, 2011

I want to find out how many 4096 byte blocks there are on my disk. I used df -B 4096 and it gave me a number but I'm not sure it's correct as I can use dd to read past what should be the final block.

So I do df -B 4096 and it reports this result:

Code:
Filesystem 4K-blocks Used Available Use% Mounted on
/dev/sda1 15618840 13190294 1635137 89% /

But when I use dd to go past that block, it doesn't report an error or anything. The command I'm using is

Code:
dd if=/dev/sda1 bs=4096 count=1 skip=15618841

How can I know that I'm really reading the very last block on the drive?

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OpenSUSE Hardware :: Rescued Disk - What To Do With The Bad Blocks That Were Not Copied

Oct 13, 2010

My old system disk almost failed me. I dd_rescued the disk onto a new one (_don't_ use dd_rhelp, that one took days and seemed to forget what it had scanned more than once). The condition of the disk was not very good. So naturally I expected the subsequent fsck.ext3 to bomb half of the new disk. But obviously only a few inodes were affected and I lost only about 10 files completely (mostly on the root partition and not the home partition - yeay!).

However, I then ran a badblocks and put all the bad blocks into a file. I could use this to run fsck but I fear that

1. It could undo or even redo worse than what the first fsck run did, and

2. giving the list of bad blocks, fsck might on the one hand rescue/flag damaged files (which is what I want), but I don't want it to flag the bad blocks on the new disk as well (they are not bad blocks anymore, just copies of bad blocks).

So, how can I single out problematic files using my list of bad blocks (which I can then look at one by one if they could be rescued) without flagging the supposedly bad blocks on the new disk.

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Ubuntu :: Increasing Disk Space For 10.10 Without Reinstalling?

Apr 18, 2011

I have installed ubuntu 10.10 inside windows (windows 7) from the ubuntu home edition CD.I have allocated a disk space of 12GB. How could I increase the disk space to 20 GB without reinstalling ubuntu?

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Ubuntu Security :: Remove The Whole Disk Encryption Without Reinstalling?

Jul 31, 2010

Is there any way to remove the whole disk encryption without reinstalling? I'm running Ubuntu 10.04.

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General :: Can I Use G4L To Image A Disk With Another From A USB Dirve

Feb 2, 2010

Sorry I am not a linux user at all. I have a linux image that needs to be installed. I have the image on a USB drive. Not really sure what I should be doing, but local disk seemed to make sense, however, when I select the usb drive I get an error, that the image can not be found

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Ubuntu :: Copying Large File Blocks Externally Causes Disk Full

Oct 15, 2010

This has happened several times now, with 9.10 and 10.04. I back up my photos periodically to external drives, using Nautilus. At the next attempted login Gnome won't start and sometimes gives power manager incorrect installation error.

First time this happened I was stumped and eventually did a clean install. Second time, I found advice elsewhere in this forum to solve this by emptying root trash, which did the trick. This time, however, root trash has nothing in it and 2 users trash were insignificant (I emptied them all anyway with rm -r). Tried looking for enormous directories but couldn't find a smoking gun. I would rather not end up doing another clean install - a painful and extreme solution. I'm continuing to look for solutions to the immediate problem, but my question really is, what causes this and how do I prevent it in the future? I've run Computer Janitor regularly and ran apt-get clean but no help. Should I do all my large scale copying from terminal? I'm not a total noob, but close.

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Ubuntu Installation :: Can't Restore A Root.disk After Reinstalling Wubi

Sep 5, 2010

Since the partition of windows7 (C: ) where wubi was installed was too small, I decided to reinstall wubi into another larger partition (E: ), keeping the old root.disk. Sadly when I replaced the root.disk ubuntu cannot boot, the loader says that there is no root.disk file, although it's there... I guess there is some kind of checksum about the virtual disk toward the loader is poiting... So how can I have my old ubuntu installation back?? I still have the old root.disk.

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General :: Mount - How To Use Qcow2 Disk Image

Dec 27, 2010

I have a large qcow2 formatted disk image, which I use as storage. Often I need to move data to and from this disk image. I mount the disk using the qemu-nbd tool as follows:

modprobe nbd max_part=63
qemu-nbd -c /dev/nbd0 /host/disk100G.img
mount /dev/nbd0p1 /home/rup/disk

But disk access fails every now and then in the midst of some I/O operation with an "Input/output error". At that point I have to manually unmount the disk and re-mount it so that I can run the program again:qemu-nbd -d /dev/nbd0umount joborkhaki/What could be the reason for this? Is there a better tool that I can use to maintain a qcow2 disk image?

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General :: Creating Image Of Hard Disk

Jul 28, 2010

I am new to the Linux world and I am not sure if what I am trying to do is achievable or not. I am trying to make an image of my existing drives running Linux on a USB and I want to use the same image off the USB to clone more bootable hard drives. Something like what Ghost does in windows. The problem is using 'dd' the image is too big ( I have 1tb drives ) and then I am not sure how to convert these images back on to new drives so that they boot in the OS as well. i am not sure if there is a utility that would let you do that?

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General :: How To Get Disk Boot Image For Fedora 12

Apr 5, 2010

I want diskboot.img for fedora 12. How to get it.

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General :: Boot Iso Image From Hard Disk?

May 17, 2010

How to boot an iso image from hard disk. I have created a linux live cd with remastersys. I want to test it. So I want to boot it from my hard disk.

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General :: How To Create / Boot RAM Image From Disk

Apr 6, 2010

How do I create/boot a ram image from a disk? I'd like to create a linux installation that is booted from a USB or CF drive and after boot does not access the disk.

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Hardware :: Create Extra Partition On SATA Disk Without Reinstalling RHEL5

Jan 12, 2011

I have Three disks installed, one SATA and two SCSI disks.

SCSI1: boot + RHEL3
SCSI2: home
SATA: RHEL5

I want to create an extra partition on the SATA disk without re-installing RHEL5. Is this possible?

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General :: Use Hard Disk Image Like A Regular Hard Disk?

Apr 6, 2010

If you have a hard disk image (including partition table, multiple partitions,...), is it possible to let Linux treat it as a regular hard disk?

By "regular hard disk" I mean I would like to have the image show up as, for instance, /dev/hdx and its partitions as /dev/hdx1,...

(I know I can mount one of the partitions in the image using "mount -o loop,offset=x ..." but I don't really like this option.)

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General :: Mounting A Multi-partition Disk Image?

Nov 16, 2010

I downloaded an raw SD card image that has two partitions. It caused some file system errors when I tried to dd it directly into an SD card. I am not sure if the card is defective or the image. Is there a way to examine this image without writing it to a physical card? Like trying to mount the partitions separately or checking the tables?

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General :: Can't Copy The Disk Image Over To Ext3 Partition

Jan 6, 2011

I recently installed Linux to run a few Linux based tools on a disk images I have, and I can't seem to copy the disk image over to my ext3 partition.

The particular distibution I'm using is BackTrack 4 r2, which is Ubuntu based. I can't seem to find specifically which version of Ubuntu is being used. The disk image is 108GB. It is currently located on a NTFS partition on a SATA hard drive connected directly to the computer. The ext3 partition is located on a second SATA hard drive connected to the same computer. It has 200GB total. I do not remember exactly how much free space it had but "df -h" showed a lot more than 108GB. The computer has 4GB of RAM and I gave it 8GB of swap space.

At this point it has been running for more than 12 hours. This is far longer than I would expect it to take had I been copying the file under Windows. How ever I do not have much experience with Linux, so if it's supose to take this long please let me know. I am planning on letting it run until I wake up tomorrow.

"cp -v" hasn't been very verbose at all. The only sign I have that indicates the computer is still trying to do something is the HDD light on my chasis that has stayed lit this whole time.

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General :: Boot From Disk Image File From Windows?

Mar 24, 2010

Is it possible to boot from a disk image file(containing linux) file that resides inside windows and add a bootloader entry for booting from the disk image.?

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General :: Disk Image Starting At Specific Inode?

Mar 9, 2010

I deleted some files on the command line and would like to learn if it's possible to recover them. It's not a terrible thing if they are gone, but I want to see what I can do. The server is configured as a hardware RAID5+1 (ext3, Debian Stable) and I *really* don't want to take a dd of the entire disk.

ls -id gets me the inode value of the directory(155655)

I'd like to create a disk image starting at that specific inode. Then there is the issue of picking an outer boundary of the disk image. I'm hoping there's a dd/ext3 genius out there to advise.

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General :: Share One Disk Image To Some Target Points?

Jan 12, 2010

I try to mount one disk image to two points.

sudo mount -o loop,user,uid=dm /home/dm/mmm/test_drive1.img /home/dm/mmm/fs
sudo mount -o loop,user,uid=dm /home/dm/mmm/test_drive1.img /home/dm/mmm/fs2

Thats done

But when i create,copy or change anything on one mount point (../fs) its not updates on second mount point (../fs2).

Does anyone know way to 'share' one disk image (.img) to some mount points?

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General :: How To Create Disk Image Of Actual Data

Nov 15, 2010

Suppose I have a 80 GB hard disk (sda) with 4GB of contents. Using a dd to copy to a different disk

Code:
dd if=/dev/sda of=/dev/sdb
copies all the contents (including free space). So sdb also needs to be 80GB.

You will notice that in VMWare or VirtualBox disk images, it is possible to set the disk to use only the amount of space of actual data. So a 80GB virtualbox/vmware image with 4GB of contents will be 4GB.

Is it possible to do that with an actual hard disk (sda) image? I want to create an image of an actual hard disk, copy it to DVD and transport it (in mail) for restoration on another computer (having same hard disk).

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General :: Unable To Mount Fat16 Disk Image?

Aug 2, 2010

I am having a rather strange issue. I have windows 98 installed into a disk image that I use bochs to boot it with. I want to transfer some files to the image but now I am unable to mount it. I will attach the drive to the loopback device but when I go to mount I get wrong fs type bad option ... etc.

The command I used to mount was

Code:
#mount -t vfat /dev/loop0 /media/loopdisk
cfdisk shows it ok as does fdisk. shows as a fat16 file system. When I attempt to check it for errors using fsck.msdos I get

Code:
# dosfsck 3.0.6 04 Oct 2009, FAT32, LFN
# Logical sector size (64543) is not a multiple of the physical sector size.

When I boot into windows 98 in bochs and check the disk it tells me there is no problems.

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General :: Which Mirror Image - Create A USB Startup Disk?

Jun 13, 2011

At the Get Slackware page at the Slackware website it gives a list of addresses which when I click one of the addresses it redirects to another page with a list of mirror images. Which address and which mirror image do I need to work with Kubuntu 11.04 on my netbook so I can create a USB startup disk? With my connection speed these mirror image downloads take about an hour and a half and I cannot just be guessing which mirror image to download.

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Fedora :: Live Disk Creation & Disk Image Backup

Aug 6, 2009

I need little help on live disk creation and disk image backup.

Can I create live disk using my hard drive installation? If yes then, can I restore the fedora from the live disk to the hard drive. I mean to say that from that live disk can I install fedora again in my hard drive.

Second question is, if I create the disk image of my hard drive( including ntfs & FAT32 partition) , can I restore it in a blank drive. If so , then can os will be restored also?

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General :: Filesystems - Convert A Disk Image Into A Sparse File?

Jul 31, 2010

I have a bunch of disk images, made with ddrescue, on an EXT partition, and I want to reduce their size without losing data, while still being mountable. How can I fill the empty space in the image's filesystem with zeros, and then convert the file into a sparse file so this empty space is not actually stored on disk?

For example:

> du -s --si --apparent-size Jimage.image
120G Jimage.image
> du -s --si Jimage.image
121G Jimage.image

This actually only has 50G of real data on it, though, so the second measurement should be much smaller.

This supposedly will fill empty space with zeros: cat /dev/zero > zero.file rm zero.file But if sparse files are handled transparently, it might actually create a sparse file without writing anything to the virtual disk, ironically preventing me from turning the virtual disk image into a sparse file itself. :) Does it? Note: For some reason, sudo dd if=/dev/zero of=./zero.file works when cat does not on a mounted disk image.

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General :: Locate Superblocks In An Unmounted Disk Image File?

Feb 7, 2010

I know there are many threads about recovering damaged superblocks. I've spent 3 evenings reading them and trying what they suggest. Invariably the commands do nothing except to report bad or missing superblocks. I've removed the physical disk from the machine and am working with a dd image file (/mnt/image). I can mount what used to be hdc1 and read its files with no problem. I'm trying to recover partions hdc6 and hdc7.$ mmls /mnt/image -b

DOS Partition Table
Offset Sector: 0
Units are in 512-byte sectors

[code]....

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General :: Way To Boot A DomU Also From The Grub (if It Is Installed In A Disk Image)?

Mar 25, 2010

I wanna know how to boot a xen from grub2 ? and is there a way to boot a domU also from the grub (if it is installed in a disk image ex :- disk.img)

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General :: Disk Image Of NT4 System Using Clonezilla Save To USB Drive?

Oct 25, 2010

we have a Win NT4 system used for an important application used at two places. At one place it has gone bad. I want to create an image from good system and restore it at the second location. Is it possible to do this using "clonwzilla live cd"? Does it harm the good system? Can I save the created image to an USB drive?

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