I basically have been doing this for years but i do it on a LVM external usb disk.


then if i need to access the drive i simply use a live linux cd so i can access the LVM disk and put it on the new drive i need it on.

it keeps it smpiler so i know what each logical volume is . like i would do


/dev/os/gentoo
/dev/os/fedora
/dev/os/windowsxp


and so on