I have a mongod node which is using much more disk space than stored object space. On Wednesday, I --repair'd the database, which brought the storageSize down to ~dataSize, now storageSize is back to 44x the dataSize!

In this case, dataSize is ~480Mb, storageSize is ~21Gb, and there are ~24Gb of database files.

> db.stats()
{
        "db" : "dbname",
        "collections" : 8,
        "objects" : 4729,
        "avgObjSize" : 101896.2233030239,
        "dataSize" : 481867240,
        "storageSize" : 21079039904,
        "numExtents" : 39,
        "indexes" : 11,
        "indexSize" : 1332688,
        "fileSize" : 25204097024,
        "nsSizeMB" : 16,
        "ok" : 1
}

I'll attach some python code that reproduces the problem.