#Centos virtual optical disk file install#
#Centos virtual optical disk file iso#

Figure F Confirm the removal.ДЄnd there you have it. When prompted to confirm ( Figure F), click Remove to delete the image listing. Now, return to the Virtual Media Manager by pressing Ctrl+D, select the CD/DVD Images tab once more, then select the missing image file within the list, and click the Remove button at the top of the window.

Press Delete to finish the job once and for all. A dialog box will appear ( Figure E), asking you to confirm your action.

Figure D Shut it down.ДЄfter the guest environment closes out and exits gracefully, return to the virtual machine snapshots area, select the snapshot in question, and then press Ctrl+Shift+D. Once the guest operating system is restored and actively running, ensure that no documents or other applications are open and then proceed to shut down the virtual machine normally via the guest operating systemвЂ™s Shut Down menu or button ( Figure D).

When prompted, uncheck the checkbox for Create a Snapshot of the Current Machine State before you click the Restore button.

#Centos virtual optical disk file iso#

Remove the ISOДЇirst, click the name of the virtual machine that used the ISO file in question ( Figure C), click the Snapshots button on the right-hand side, and then restore the snapshot you recently created by clicking the snapshot name and pressing Ctrl+Shift+R. This guide applies also to floppy and hard disk images as well.ДЄ slideshow version of this blog post is available as a TechRepublic Photo Gallery. Here is a recommended procedure to quickly resolve this issue. Until this snapshot is removed with the associated VM, the discrepancy refuses to clear and you are unable to remove the ISO file from the images list. The reason for this anomaly is because the disc image is mounted within a VM and is being recognized by a snapshot. Figure B Locate the problem in the Virtual Media Manager dialog box. In other words, you canвЂ™t exactly resolve this issue right off the bat. Figure A You encounter the VirtualBox error message.Д¬licking the Check button takes you to the Virtual Media Manager dialog box ( Figure B), and under the CD/DVD Images tab, you discover that, despite your efforts to remove the recently deleted ISO from the list, the Remove button is greyed out and unable to be used. Unfortunately, you get an error message ( Figure A) the next time you fire up VirtualBox. Once a VM snapshot is made within VirtualBox, you turn the VM off and delete the ISO, knowing that it no longer serves a purpose and you want to save disk space. Meanwhile, it would seem prudent for you to create a snapshot of your virtual machine (VM) in the exact state it is in, in case something should go wrong. After setting up the virtual machine, you get the guest operating system booted up and you mount an ISO image to the virtual disc drive for further examination.

#Centos virtual optical disk file install#

So you just finished an operating system install within VirtualBox that you plan to use for testing purposes. It is possible to remove a seemingly unremovable ISO in Oracle's Virtual Box, if you follow these steps. For the Hard disk section, Choose 'Use an existing virtual hard disk file', and click on the folder icon on the right to point to the Atomic Host image.How to delete unremovable disk images in VirtualBox Run Virtualbox, and create a new Virtual Machine. With a ready VM image file and the required metadata ISO, you are now ready to create the Virtual Machine. With the necessary information in place in the files, create an ISO image that contains the two files: genisoimage -output init.iso -volid cidata -joliet -rock user-data meta-data Create Atomic Host Virtual Machine Note that the line with the '#' at the start is not a comment it is required as part of the syntax used by cloud-init. Now, create a file named user-data: #cloud-config In your working directory, create a file named meta-data, and insert the following contents: instance-id: atomic-host001

We can use Virtualbox to serve metadata through an ISO file that is presented as a virtual optical drive to the Atomic Host VM. Luckily, the Atomic Host image creators have configured the image to be able to pull metadata from an optical disk. This also means that we cannot log in or use the VM. This means that the hostname, user password, and other system components cannot be initialized by Virtualbox. The Atomic Host image is designed to be run on a cloud infrastructure, so it relies on metadata from a metadata server to initialize the Operating System through cloud-init. Qemu-img convert -f qcow2 -O vdi filename-of-downloaded-imge.qcow2 converted-image-filename.vdi Create a Metadata ISO