ANSWER:

/home is near 100% full. It appears to only have 340k available. If you are trying to use more than 340k of space, I’d guess this is the problem. You didn’t say which filesystem you were trying to write to, but none of the ones listed here appear to be the one described by Total file system capacity:88.1 GB (Used 47.1GB available: 40.9GB).

by stew from http://serverfault.com/questions/382107