安装contos7.2老是报错

安装到一半报错,大神帮忙看看。。。。。。。。。
An unknown error has occurred
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The output below may help determine the cause of the error:
anacond 21, 48.22 56-1 exception report
Traceback (most recent call first):
File "/usr/lib/python2.7/site-packages/blivet/init.py".line385,indolt
if boot. type=
"'m darray".
File "/usr/Lib/python2.7/site-packages/blivet/init.py",Line224,inturnOnFilesystems
storage. dolt(callbacks)
Debuq may take you to ttyl
Debug
正在 /dev/mapperlcentos-boot 上创建文件系统 xfs
CentOS Promotion SIG

换镜像,用centos7.6