ufsdump的问题，我怎么做不了增量备份？

zzsg

在做一个backup script, 增量备份测试老是不成功，结果发现直接ufsdump也不行了，请大家帮我分析一下，记录如下：

bash-2.05# ufsdump uf0 /dev/rmt/0n /etc/inet
  DUMP: Date of this level 0 dump: Tue Apr 10 10:07:48 2007
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/vx/rdsk/bootdg/rootvol (zzz:/) to /dev/rmt/0n.
  DUMP: Mapping (Pass I) [regular files]
  DUMP: Mapping (Pass II) [directories]
  DUMP: Writing 32 Kilobyte records
  DUMP: Estimated 532 blocks (266KB).
  DUMP: Dumping (Pass III) [directories]
  DUMP: Dumping (Pass IV) [regular files]
  DUMP: 510 blocks (255KB) on 1 volume at 1164 KB/sec
  DUMP: DUMP IS DONE
bash-2.05# ufsdump uf1 /dev/rmt/0n /etc/inet
  DUMP: Date of this level 0 dump: Tue Apr 10 10:07:56 2007
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/vx/rdsk/bootdg/rootvol (zzz:/) to /dev/rmt/0n.
  DUMP: Mapping (Pass I) [regular files]
  DUMP: Mapping (Pass II) [directories]
  DUMP: Writing 32 Kilobyte records
  DUMP: Estimated 532 blocks (266KB).
  DUMP: Dumping (Pass III) [directories]
  DUMP: Dumping (Pass IV) [regular files]
  DUMP: 510 blocks (255KB) on 1 volume at 1175 KB/sec
  DUMP: DUMP IS DONE
bash-2.05#

zzsg

以解决，增量备份只对整个file system有效