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Troubleshooting
===============
- If re-installed, there is some leftovers from LVM/Device Mapper causing CentOS installer
to crash (even if 'clearpart' is specified). After first crash, it may be useful.
* Clean partition tables with
dd if=/dev/zero of=/dev/<device> bs=512 count=1024
* Destroy rogue LVM VGs
vgdestroy <vgname>
* Destroy rogue device mapper devices
dmsetup info -C
dmsetup remove_all
dmsetup remove <name>
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