Just adding in that I had a similar problem while testing the 2.31 to 2.32 upgrade on a database with a very large datavalueaudit table. I increased the disk space 5x and still ran out of space. I eventually came to the same conclusion as Jasper and cleared the datavalueaudit table, and then it proceeded normally.
I suspect that this will be a problem for a lot of people with large databases as they start moving from 2.31 to 2.32 and may merit some guidance in the 2.32 upgrade notes.