If you really want to make the disk visible (for example, use gparted, etc.), and not just copy some files:
You can create a pseudo-vmdk, which will actually be a link to an existing physical disk (or one or more of its partitions). This command, for example,
VBoxManage internalcommands createrawvmdk -filename mydrive.vmdk -rawdisk \\.\PhysicalDrive0
This displays the first physical disk as a whole. You should run this as root / admin (for win7, run cmd.exe as admin and cd in the directory where you have vmware)
(only for displaying sections 3.4: - sections 3.4)
Then map vmdk to drive in vm and presto!
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