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Description of problem:
If you kickstart a RHEL7 build using the following command for a volume:
logvol / --fstype="xfs" --name=lv_root --vgname=vg_master --percent=75
the anaconda-ks.cfg at the end has --percent and --size commands for that volume. --percent and --size are mutually exclusive and cant be used together.

example output:
logvol /  --fstype="xfs" --percent=75 --size=24192 --name=lv_root --vgname=vg_master

Version-Release number of selected component (if applicable):
7.1


How reproducible:
Always

Steps to Reproduce:
1.Kickstart build using following command for root volume
logvol / --fstype="xfs" --name=lv_root --vgname=vg_master --percent=75

2. Check anaconda-ks.cfg once build is complete 
3.

Actual results:
logvol /  --fstype="xfs" --percent=75 --size=24192 --name=lv_root --vgname=vg_master


Expected results:
Either
logvol /  --fstype="xfs" --percent=75 --name=lv_root --vgname=vg_master
or
logvol /  --fstype="xfs" --size=24192 --name=lv_root --vgname=vg_master


Additional info:

I can confirm this as changed in the minor release RHEL 6.7.

https://github.com/rhinstaller/blivet/pull/501

Reproduced on released RHEL 7.2, fix not present in Snapshot.3 (RHEL-7.3-20160908.3).

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2168.html