Mac OSX VBoxManage: error: Cannot read the partition information from '/dev/disk0'

[DonyorM]

I am trying to get VirtualBox to boot up my Bootcamp Partition. Does anyone know why I'm getting the error "VBoxManage: error: Cannot read the partition information from '/dev/disk0'"?

What I typed into terminal

WinXPmbp manila$ chmod 777 /dev/disk0 /dev/disk0s4
WinXPmbp manila$ sudo VBoxManage internalcommands createrawvmdk -rawdisk /dev/disk0 -filename "/Users/home/VirtualBox/WinXPMBP/bootcamp.vmdk" -partitions 4
Password:
VBoxManage: error: Cannot read the partition information from '/dev/disk0'
VBoxManage: error: The raw disk vmdk file was not created

[Frank Mehnert]

Try if

sudo dd if=/dev/disk0s4 of=foo bs=1024 count=1

works. If not then it's a permission problem.

[DonyorM]

Replying to frank:

Try if

sudo dd if=/dev/disk0s4 of=foo bs=1024 count=1

works. If not then it's a permission problem.

This is what I got;

1+0 records in
1+0 records out
1024 bytes transferred in 0.029385 secs (34848 bytes/sec)