Going crazy with this problem where the gory details are on Usenet alt.os.linux at URL: https://groups.google.com/forum/#!topic/alt.os.linux/D7E7FQ1NLNk
Why doesn't Ubuntu 18.04 ask to install next to Windows 10 Pro single HDD as a dual boot?
Basically, Ubuntu 16.04 works fine but Ubuntu 18.04 installer fails every time:
Size: 1921843200 bytes (1832 MB)
Some debugging commands that others will find useful and their output are:
/dev/sda: TYPE="promise_fasttrack_raid_member" <===== this is critical data!!!
/dev/sda1: LABEL="Disk1" ... TYPE="ntfs" ...
sudo fdisk -luS /dev/sd?
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Disklabel type: dos
Device = /dev/sda1
Boot = *
Start = 2048
End = 1871601663
Sectors = 1871599616
Size = 892.5G
Id = 7
Type = HPFS/NTFS/exFAT
sudo apt install smartmontools
When it asks for a mail-server configuration, I selected:
Then I could run the smartctl command:
sudo smartctl -A /dev/sda
Power_On_Hours = 208 (Raw Value)
(The point is that it's a new HDD and I didn't get cheated with an old one!)
The net is that there is a huge bug in omission in the description for the Ubuntu 64-bit Desktop 18.04 installer which works DIFFERENTLY from the 64-bit Ubuntu Desktop 16.04 installer in the exact same machine under the exact same circumstances.
The Ubuntu 16.04 Desktop installer installs alongside Windows when the controller is RAID but the disks are not RAIDed; but the Ubuntu 18.04 Desktop installer not only barfs but it provides zero useful output under the exact same circumstances.
This bug is evident in the tutorials also in that they don't cover this situation in the least, so everyone is left to fumble willy nilly until they figure out, on their own, with no help from Ubuntu, about this bug.