Information on Disk 2 when using 1TB devices:
DISK0 not found when you deploy Windows on Surface Pro Model 1796 or Surface Laptop
https://support.microsoft.com/en-US/help/4046108
Information on issues you may have after using older Windows versions or older disk tools to modify a 1TB storage spaces volume, and how to correct it:
Surface Pro Model 1796 and Surface Laptop 1TB display two drives
https://support.microsoft.com/en-US/help/4046105
You won't get rid of the pagefile error, that's a side effect of using an older version of Windows than the minimum version of Windows that the device was designed for:
Surface supported operating systems