I bought a specially-built desktop on behalf of an elderly lady friend. It has a 128GB SSD and a 500GB HDD and the PC was demonstrated with Windows 10 loaded.
The first thing I did was to install Ubuntu 16.04 and all was fine – after a while. Then I screwed up, as usual.
Using Gparted I found that Linux was on the the SSD, as expected, although it is sdb and the HDD is sda. I thought it would be a good idea to delete the partitions on the HDD and use it solely as a backup medium. I did this and discovered that there is a lot more to adding a hard drive than meets the eye. A search on the web revealed two useful websites that described the process and I forged ahead. It didn't work, of course, probably something to do with mounting the drive after the early commands, so I closed down with the intention of tackling it today.
Booting up took ages and resulted in the message “Welcome to emergency mode!” followed by a few unhelpful (to me) suggestions. Hence my call for help.
The easiest solution might be to re-install Ubuntu, which is no problem at all (unless deleting all the partitions on the HDD has screwed things up), but if there is a more interesting way of solving things, I would be very grateful for advice.
Intel i3-2120 CPU 3.3GHz
[EDIT] Using a live USB, I used Gparted to create a partition in the deleted space on the HDD and can save files to it, but still can't boot normally into Ubuntu.