426 Failure writing network stream ，空間不足

ftp 複製檔案, 最後報錯 ： 

b2b_1.DMP: short write
426 Failure writing network stream.
1837684672 bytes received in 30 seconds (6e+04 Kbytes/s)
local: b2b_2.DMP remote: b2b_2.DMP
227 Entering Passive Mode (10,13,7,115,22,98)
150 Opening BINARY mode data connection for b2b_2.DMP (143360 bytes).
local: b2b_2.DMP: No space left on device
426 Failure writing network stream.
ftp>

後來查詢發現是目標機器的那個目錄空間不足 ， 暈 。 

/dev/sda10            9.7G  9.2G     0      100%     /