When you first did the suicide mission did anyone die?

I lost zaeed and mordin the very first time I did it. Everyone survived getting to the base, got past the first section without casualties but then on the second section I chose zaeed as squad leader (thought him being a Merc and a veteran he could lead but he died). I also chose grunt to take the survivors to the Normandy which didn't have enough firepower for the team holding the line while I dealt with the human reaper this mordin was killed. I reset the missions afterwards because I felt cheated cause I didn't know what I did wrong.