dump 备份/分区到另一块硬盘目录失败Files are not on same file system

hunterdong

dump -0 -f /u01/changlog /dev/hda3
  DUMP: Date of this level 0 dump: Fri May 12 09:45:50 2006
  DUMP: Dumping /dev/hdd5 (/u01 (dir /changlog)) to /dev/tape
  DUMP: Added inode 8 to exclude list (journal inode)
  DUMP: Added inode 7 to exclude list (resize inode)
  DUMP: Label: /u01
  DUMP: mapping (Pass I) [regular files]
  DUMP: Files are not in the same file system(/dev/hda3).
  DUMP: The ENTIRE dump is aborted.

为什么呢?文件不在一个文件系统？那是我的boot,我试了/分区，也是一样。

google FILES are not in the same file system.根本没有例子