[16:41] <CarlFK> I am having trouble with the net installer - the kernel finds the SD card reader (with no card in it) first, gives it sda, which breaks preseed d-i partman-auto/disk string /dev/sda
[16:42] <CarlFK> wily install uses 4.2.0-25-generic, finds the spiny disk first.  
[16:43] <CarlFK> wily installer uses 4.2.0-16 , xenial installer uses 4.4.0-4, both find the card reader first 
[16:44] <CarlFK> is there a param that will blacklist the card reader ?