mongos> db.bindata.drop()
true
mongos> db.bindata.insert({"a":new BinData(0x80,"AAAA")})
mongos> exit
bye
[sv@sv ~/dev/mongodb_repos/QA-277 (static_initializers)]$ ./mongoexport -c bindata -d test
connected to: 127.0.0.1
{ "_id" : { "$oid" : "5115870c5c526695ddf7752e" }, "a" : { "$binary" : "AAAA", "$type" : "ffffff80" } }
exported 1 records