Hi Bill,
I do not think it was the Row Tables, but the data load for the indexserver and HANA.
If loading 30G of DATA, using the HANA One 60G AWS instance and from the DF list of volume usage, it looks like you did not have enough room on HANA which is prob the root cause of the crash.
HANA requires 30 of the 60G from HANA One to run its application/services/etc - so in reality, there is only 30G of memory that is available. I know you are well versed and a HANA expert, as I have followed many of your posts, so if you knew this and does not apply - just trying to help! 
Cheers!