Website Updates Newsvirtual Disk Images

Posted : admin On 8/23/2021
  • If you are an existing [email protected] Disk Image customer and are having difficulties using the software, you can find help using any of the following options: If you want to re-download software, please click here. Buy [email protected] Disk Image On-Line on a secure web site.
  • In order for the installation program to automatically recognize the driver disk, the volume label of the storage device must be OEMDRV. Also, you will need to extract the contents of the ISO image file to the root directory of the storage device rather than copy the ISO image itself. See Automatic Driver Update (x86).
  1. Website Updates News Virtual Disk Images Download
  2. Website Updates News Virtual Disk Images Download
  3. Virtual Disk Images For Virtualbox

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Virtualization software creates a lot of possibilities, in a wide variety of fields. There are a wide variety of solutions available which are free / open source. These include KVM, XEN, QEMU, User-mode Linux, VirtualBox and others. One can now easily create virtual appliances for specific purposes, a database server, a backup server, repository and or search.

Virtual Machines typically reside inside a virtual hard disk image, and knowing how to manipulate these images can allow one to create and update appliances outside the virtual machine environment, open even more possibilities to scripted creation, update and customization of virtual appliances. In this article I will provide a quick rundown of software I have found useful for preparing and manipulating virtual disk images; some of the tools mentioned below are common tools part of the the core Linux utilities you find in every distribution while others are a little more obscure or rarely used.

Image Creation

parted

Parted can be considered a more modern version of fdisk. Its a disk partitioning tool that can not only create partitions, but also move and resize them too. It also has the advantage that you can script the operations and it will work equally well on devices as well as files. So in your script, you can include something like this to create a virtual disk image with 4 primary partitions on:

You can then mount this image file using kpartx (described below)

dd

dd is a very versatile tool for copying large block of information between files, or between devices or between files and devices. Its a core unix tool, and very versatile. You can find an extremely complete guide on its usage by example here: http://www.linuxquestions.org/linux/answers/Applications_GUI_Multimedia/How_To_Do_Eveything_With_DD. This is a kind of dd cookbook.

When discussing virtual disk images, its extremely useful for creating or increasing in size sparse disk images, and also copying image files into loopback devices and so on. In the parted section there is an example of creating a sparse file. Below shows how you might use it to copy from a disk file into a loopback device.

sudo dd if=centos4/data.img of=/dev/mapper/loop0p3 bs=4096 conv=notrunc,noerror

Filesystem Tools

These tools will be extremely familiar to many linux users, and there is plenty of documentation on their use. They are only mentioned here for completeness sake. Since clearly they are necessary for the creation of virtual disk images. You can use any of them directly on disk images, loop back devices or device mapper devices.

Website updates news virtual disk images iso
  • mkfs - create a file system (e.g. mkfs -t ext3 /dev/mapper/loop0p2)
  • mkswap - set up a swap file or partition
  • e2fsck - check an ext2/3 file system
  • resize2fs - resize an ext2/3 file system
Virtual disk download

Mounting

kpartx

Kpartx requires Device mapper support in the kernel, and dm userspace tools should be present.

Kpartx is an extremely useful tool for being able to mount partitions that are within a virtual disk image. Virtual Disk immages, can either be files which contain file systems and no partition table. These can be mounted fairly easily with the loopback device using mount -t auto -o loop filename.raw /point or they can be images which contain a partition table and one or more partitions, or they can even contain LVM volumes. With the latter two, both can be read with kpartx. kpartx reads and understands the partition table, so it can know in the virtual image file where each partition begins and ends, and then maps each portion of the file to a different device mapper device using a naming convention like /dev/mapper/loop0p1, /dev/mapper/loop0p2 and so on. If they image file also contains LVM volumes, these will also be mapped in with the device mapper. These sections once mapped can be mounted like normal devices. So for example:

Website Updates News Virtual Disk Images Download

will create the mapping for the partitions in a the file centos.raw which contains a boot partition and the root partition. These can then be mounted normally. The following script will do the reverse and unmount the partitions, remove the mapping in the device mapper and delete the loopback device.

mount –bind

mount –bind is worth a mention, as its particular useful in setting up a chroot environment. mount is typically used to mount devices or loopback devices so the filesystem can be accessed however with mount –bind the intention is slightly different. You can make the same part of the directory tree appear in two different places. When setting up a chrooted environment to be able to update software on a disk image, you might typically do the following:

The first two mount statements are regular mount systems, to mount the root file system, and then the boot file system. The third mount statement used mount –bind to make the /dev file system of the host computer visible as part of the directory tree of the mounted loopback images. The second mount –mind statement, just makes a regular directory within the host filesystem visible also in the mounted loopback images file system. Finally when the chroot command is executed, the chosen parts of the host file system will still be visible. Finally a note of caution here, typically chrooted environments are used to create secure environments that software cannot break out of. Making the host systems /dev file system available in the chrooted environment is not a secure thing to do, and should only be done in special circumstances - such as these, the preparation of a virtual disk image. Even then, cautions should be taken, its still quite easy to hose your system by running grub incorrectly or whatever.

device mapper, lvm

These two tools are just worth a quick mentioned here, as they are sometimes used by the other tools mentioned (e.g. kpartx). However if unlikely you will need to use them directly.

Editing

chroot

linux32

sed - http://www.gnu.org/software/sed/

grub - http://www.gnu.org/software/grub/

Bootstrapping Distributions

debootstrap

rinse

Image Conversion

qemu-img

vboxmanage

Sparse files

zerofree - http://intgat.tigress.co.uk/rmy/uml/index.ht

Make an exact copy of your PC disks by creating a whole disk backup

[email protected] Disk Image is a disk image software that makes an exact copy of any PC disk (HDD, SSD, USB, CD, DVD, Blu-ray etc.) and stores it into a folder. The disk images may be used for backups, PC upgrades or disk duplication purposes.

In case of computer failure, a backup image may be used to recover your computer system or find and restore any necessary files from within an image.

Website Updates News Virtual Disk Images Download

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Key Features

Complete Disk Backup

Create and Restore disk image backup using only occupied clusters

Image Compression

Use various levels of data compression

Virtual drives mounting

Mount images as virtual drives for easy backup browsing

Image verification

Automatic image verification after creating

Incremental and Differential images

Create incremental images to reduce backup size

Scheduled backups

Schedule Disk Image to run at a certain time for convinience and automation

Rescue Bootable Media

[email protected] Boot Disk Lite may be used to start a PC from CD, DVD, USB flash drive

Scripting

Create scripts for all operations in Script wizard to be later on executed from a console or a command file; suited for unattended mode Squad Captain.

Clone / Copy Disk

Copy entire disk or partition to another disk. Only used blocks are copied; partitions can be resized during the copy process.

E-mail notifications

Get notified when backup is created

Cloud storage

Backup to and restore directly from AWS cloud storage

Pricing Table

Please choose the correct version and licensing model according to your business needs

basic features

Licenses:

Standard

adds incremental backups, bootable disk, raw images

Licenses:

Virtual Disk Images For Virtualbox

adds scheduled backups, encryption, scripting, notifications and Windows Servers support

Licenses:
  • Personal license - for non-commercial purposes. The Personal License will be assigned to the individual's name.
  • Corporate license - for commercial use. With a Corporate License the company can use the program in a business, academic, or government environment.
  • Enterprise license - for large corporations and enterprises. It means that you can use software without of any limitations at all company's offices and branches (worldwide).