I am trying to load Red Hat onto a Dell PowerEdge 2950 with (6)300G SAS drives. I have the first two drives set up as a RAID 1 and the remaining four drives set up as RAID 10. I did it that way because we load our OS on one set of drives and an Oracle database on the rest. I configured the RAID and tried to load Linux, but this is the last thing on the screen before it stops:

Traceback (most recent call last):
File "/usr/bin/anaconda", line 1122, in ?
instClass.setInstallData(id)
File "/usr/bin/anaconda/kickstart.py", line 1440, in setInstallData
raise KickstartError, e
kickstart.KickstartValueError: specified disk sda in partition command which does not exit