1. 为VM打快照；

1. 备份home数据；

# yum install xfsdump -y

[root@testCentos7 home]#  xfsdump -f /dev/home.dump  /home

xfsdump: using file dump (drive_simple) strategy

xfsdump: version 3.1.7 (dump format 3.0) - type ^C for status and control

 ============================= dump label dialog ==============================

please enter label for this dump session (timeout in 300 sec)

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