/dev/sdb1 已经挂载或 /mnt/mountpoint3 忙解决办法在挂载硬盘分区的时候，会出现mount: /dev/sdd1 already mounted or /data3 busy或者是在执行格式化分区的时候也会出现/dev/hdb1 is apparently in use by the system; will not make a filesystem here!解决方法：