Why does kickstart installation of Red Hat Enterprise Linux 7 fail with error "installing package libxkbfile-devel-1.08-5.el7.x86_64 needs 64kb on / filesystem" ?

Issue

• Kickstart installation of Red Hat Enterprise Linux 7 fail with the following error messages.

YUMRPMTransError: Could not run transaction.
installing package ( a whole of files) needs (certain amount of diskspace according to each package) on the filesystem.

• Example error:

installing package libxkbfile-devel-1.08-5.el7.x86_64 needs 64kb on / filesystem
YUMRPMTransError: Could not run transaction.

• Here is the partitioning information.

bootloader --location=mbr --driveorder=sda,sdb --append="crashkernel=auto rhgb quiet"
clearpart --drives=sda,sdb --all --initlabel
part swap --size=1992 --ondisk=sda
part swap --size=1992 --ondisk=sdb
part raid.01 --size 500 --asprimary --ondrive=sda
part raid.02 --size 17600 --asprimary --ondrive=sda
part raid.03 --size 5000 --grow --ondrive=sda
part raid.04 --size 500 --asprimary --ondrive=sdb
part raid.05 --size 17600  --asprimary --ondrive=sdb
part raid.06 --size 5000 --grow --ondrive=sdb
raid /boot --fstype ext4 --device md0 --level=RAID1 raid.01 raid.04
raid /home2 --fstype ext4 --device md1 --level=RAID1 raid.02 raid.05
raid pv.01 --fstype ext4 --device md2 --level=RAID1 raid.03 raid.06
volgroup sysvg pv.01
logvol / --vgname=sysvg  --size=3000 --name=root