I've been having the same problem, and thought that 3150 would be the solution - sadly no.
So to summarise my version:
1. I have to disconnect all external storage media before running the Windows VM, otherwise I get the "you have more than one Windows Partition, and therefore it is not a standard Bootcamp install so I won't run, read the manual for an answer which isn't there" (Well it says something like that)
2. Simply dragging the drives to eject them in OSX isn't sufficient - they have to be physically unplugged, or the power switched off.
3. My external drives (and I have tried just one at a time) consist of Maxtor OneTouch IIs and NexStar 2.5" enclosures. I would have thought the Maxtor was sufficiently common to work.
4. I then get the VM up and running, and plug in the external drive (autoconnect is off fwiw) I then (well this is what I was trying today) drag the icon in OSX to eject the drive, then click the icon lower right in Parallels (and I have also tried the Parallels menu just in case) to "connect" the drive to the VM. This works to all appearances - the drive is listed, it becomes ticked, the OS responds to seeing the new device, and it appears in the list of USB devices connected.
5. Except, the external drive isn't accessible, or even visible to explorer, so it is ?connected but isn't connected? Disk manager cannot see it, but the device manager can.
The previous version of the RC (3130?) at least didn't require me to physically unplug my external drives before firing up Windows, so "upgrading" to 3150 has actually made things worse than before.
Any suggestions appreciated, but I think that I may just have to wait for yet another RC to come out, and cross my fingers.
Last edited: Feb 15, 2007