Description of problem:
In short: `raid' kickstart command allows creation of ext2,
ext3, swap, and vfat filesystems but it does not allow creation
of physical volume.
The longer story: I performed manual install on top of existing
VG located on PV which in turn was located on softraid device.
anaconda-ks.cfg created by installer had something along the lines:

#part raid.5 --noformat --onpart sda5
#part raid.12 --noformat --onpart sdb5
#part raid.13 --noformat --onpart sdb6
#part raid.6 --noformat --onpart sda6
#raid /boot --noformat --useexisting --fstype ext3 --level=RAID1 --device=md0
raid.5 raid.12
#raid pv.16 --noformat --useexisting --fstype "physical volume (LVM)"
--level=RAID1 --device=md1 raid.6 raid.13
#volgroup geralt --noformat --useexisting --pesize=4096 pv.16
#logvol / --fstype ext3 --name=F9 --vgname=geralt --size=10240
#logvol swap --fstype swap --name=SWAP.1 --vgname=geralt --size=4096

I tried to uncomment these lines and perform kickstart install
but that failed with very long traceback which I attach. I believe
this is due to --fstype option value in raid pv.16 line.