Raid Distibution - Emergency Mode

I was hired recently to administer an old data center, I have never used DELL EMC storage solutions, and I am desperately in need of help. The support contract for this unit has expired and I am hoping I can find some guidance here on where to start to fix my issue.   

The storage went into emergency mode yesterday and I had to delete some volumes to get out of it, I have paused snapshots creation too. Not sure if these are the right steps. I did a lot of research on the internet including this forum, but I am not sure what to do. I will post these pictures of my situation hopefully someone can help:

the last emergency mode happened because I was trying to move a lot of data into this volume, not sure if it was the size of the data or the sudden increase of it. But one thing that I can remember is when raid 10-DM was full the emergency mode was triggered. 

Excuse my ignorance I usually work with simple stuff like managing windows servers etc, I really appreciate any help or pointers on what to do next. 

Thanks