Virtualbox raw disk access mac

On some host platforms, such as Windows Vista and later, raw disk access may be restricted and not permitted by the host OS in some situations. Just like with regular disk images, this does not automatically attach the newly created image to a virtual machine. This can be done as follows:. When this is done the selected virtual machine will boot from the specified physical disk. This raw partition support is quite similar to the full hard disk access described above. However, in this case, any partitioning information will be stored inside the VMDK image.

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This means that you can install a different boot loader in the virtual hard disk without affecting the host's partitioning information. While the guest will be able to see all partitions that exist on the physical disk, access will be filtered in that reading from partitions for which no access is allowed the partitions will only yield zeroes, and all writes to them are ignored. To create a special image for raw partition support, which will contain a small amount of data, on a Linux host, use the command:.

The command is identical to the one for full hard disk access, except for the additional -partitions parameter. As a result, the numbers given in the above example would refer to the first primary partition and the first logical drive in the extended partition, respectively. Note that on OS X you can only use partitions which are not mounted. Eject the respective volume first.


The numbers for the list of partitions can be taken from the output of the following command:. The output lists the partition types and sizes to give the user enough information to identify the partitions necessary for the guest. Images which give access to individual partitions are specific to a particular host disk setup. You cannot transfer these images to another host. Also, whenever the host partitioning changes, the image must be recreated.

If this is not feasible, there is a special variant for raw partition access, currently only available on Linux hosts, that avoids having to give the current user access to the entire disk. To set up such an image, use:. When used from a virtual machine, the image will then refer not to the entire disk, but only to the individual partitions.

I'm using Mac OS I am running OSX Tiger with some of the same problems.

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I was able to get a single partition to work using the following:. Where X was the partition to access listed with the 'diskutil list' command. This created the vmdk file as root so I reverted it back to my userid as the owner and group with:. Finally I had to open up the permissions on not only the vmdk file but also the device file using:.

Which opens up a huge security hole but hopefully they'll come up with a better way of doing this in the future.

Other programs seem to be able to access the disks and partitions directly without the need to open up the permission completely or running as root ExtFS comes to mind. Also I played around unsuccessfully with the -partition option but settled with this since I only need access to one partition. Thanks dmyurych, It's great that that is working with Tiger.

Unforutnately, though it doesn't seem to work in Leopard Also, I think you made 2 typos I presume your first line of code should be:. Yes thanks jonrodolea that was a typo. Well this is one of the few places I found searching for a solution to my problem, so just wanted to leave a comment to hopefully help anyone else who is experiencing the same problem with Tiger.

Thank you, dmyurych Dmytryi Yurievich propably!

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I did same and it add bootcamp to vmdk While I appreciate the workaround, I'll just add my voice that it's not ideal, as I now need to go figure out how to teach grub to deal with a new disk geometry, so whole-disk raw access is still desirable and at the moment grub is failing to probe the disk geometry Ugh, looks like this form doesn't respect plaintext formatting. Once, more with ' WikiFormatting ':. Hi, sorry to use this bug report as a forum, but could anyone boot the bootcamp partition using this procedures? Oliver - in my instance this workaround does not result in a bootable partition because the VB guest sees the partition as an entire disk, so in my case of Fedora 10, fedora writes an x86 bootsector to the 'drive', a partition map, and then the partition.

My bootloader, rEFIt expects there to just be a bootable partition there, so it doesn't know what to do with all that extra stuff. I put in an RFE for rEFIt to be able to chainload this setup, but even better would be for this bug to be fixed so it's unnecessary.

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If anybody read my prior comment, please note that this page ate the backticks around whoami and that these perms need to be applied after each OSX boot, they get reset on boot. OK, tracked it down. OSX is pretty paranoid about opening the devices, and the error code printed by virtualbox was very misleading the original error code was EBUSY. In the first place one cannot open an entire disk for writing when one partition is mounted. There are probably ways around this otherwise it'd be impossible to repartition , but it looks like they are not necessary.

After all it's good that people cannot shoot themselves into the foot.

Virtualizing physical partition with createrawvmdk fails on Mac OS X Leopard

So either build the latest code yourself should show up in the public svn soon or wait for the next VirtualBox release. I've created the physical vmdk: VBoxManage internalcommands createrawvmdk -filename raw-disk-linux. If I do fdisk -l, I can see the true partition table. Somehow the partitions are gone? Or is the virtual disk layout CHS? The createrawvmdsk command works for sure, but isn't very useful to me :P. If the latter, something like rEFIt's gptsync is often necessary to align things properly. Under Windows 7 and 10 First you must start the command line tool under linux also with administrative privileges!

Change the directory to the VirtualBox executables and then execute the command.

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Command Prompt — Run as Administrator Accept the privileges escalation: Administrator escalation confirmation Execute the following line: Microsoft Windows [Version All rights reserved. Skip this if you are using linux. Windows — Run as administrator Confirm administrator privileges escalation under Windows 10 and 7.