dump做个备份，发个随笔记录下

sudo dump -0j -f ./home.dump.bz2 /home
DUMP: Date of this level 0 dump: Tue Dec 9 16:44:55 2014
DUMP: Dumping /dev/sda8 (/home) to ./home.dump.bz2
DUMP: Label: none
DUMP: Writing 10 Kilobyte records
DUMP: Compressing output at compression level 2 (bzlib)
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 3058779 blocks.
DUMP: Volume 1 started with block 1 at: Tue Dec 9 16:44:56 2014
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: 65.71% done at 6699 kB/s, finished in 0:02
DUMP: Closing ./home.dump.bz2
DUMP: Volume 1 completed at: Tue Dec 9 16:51:43 2014
DUMP: Volume 1 took 0:06:47
DUMP: Volume 1 transfer rate: 3993 kB/s
DUMP: Volume 1 3045920kB uncompressed, 1625279kB compressed, 1.875:1
DUMP: 3045920 blocks (2974.53MB) on 1 volume(s)
DUMP: finished in 407 seconds, throughput 7483 kBytes/sec
DUMP: Date of this level 0 dump: Tue Dec 9 16:44:55 2014
DUMP: Date this dump completed: Tue Dec 9 16:51:43 2014
DUMP: Average transfer rate: 3993 kB/s
DUMP: Wrote 3045920kB uncompressed, 1625279kB compressed, 1.875:1
DUMP: DUMP IS DONE