boot camp disk not enough space

Hi

partitioning the SSD

tried the other disk but it won't accept it

Actually something must have happened because I jut had to reinstall OS and my files from time machine after every time I rebooted I got a message that boot disk could not be found... Small disaster!

I don't think this works. Could it be that high sierra has a different file format? the APS or whatever file format and boot camp is not compatible with high sierra?

Apple Support document = Boot Camp says keep the other disks but make sure they are in higher bays.

My 2nd disk is Mac Users. The one disk only solution means I will not be able to login as my profile is on the other disk. Has anyone tried this and then yanking-out the users disk? Likely a crash?

But I understand it is not possible to create windows on a disk that is not the Mac OS disk. It is technically an external drive...

I did see someone on youtube do this with an external drive.

But something is wrong here - is it High Sierra file type? Should I go back to El-capitan?

So I figured this out

1st the target Mac OS needs to be in disk space 1 in a mac pro. (this is in the instructions)

You can have other disks inserted... for now

Before you run bootcamp you need to turn off time machine and unfortunately you need to reformat and reinstall the OS disk = ouch!!! But no other way to get over the space issue.

Now you can run bootcamp and it creates the BOOTCAMP partition on the Mac OS disk.

When Windows installation starts it is using the CD or USB (ISO) so now you need to have the side of the MP open and you need to remove or pull-back the other drive sleds - so that ONLY the target disk is in the machine (I also removed my projects scratch ssd from pcie)

Now windows can install as required. Seems as mentioned here that windows can only have 1 disk in the machine to not throw some x800xxx error.

Apple Bootcamp instructions are incorrect as they instruct you can - but you can't.

Install restart - hold the option key and back to Mac, remove the windows CD, check the default start-up disk and away you go. Windows 7 and some fun old games like settlers and Civ III (much easier to play than boot camp ;-) )