keyerror /dev/sda

keyerror during ks installation

$ cat abrt.log 
executable:     /mnt/runtime/usr/bin/python
hashmarkername: anaconda
kernel:         2.6.32-220.el6.x86_64
product:        Red Hat Enterprise Linux
reason:         KeyError: '/dev/sda'
time:           Tue 06 May 2014 10:42:15 AM CST
version:        6.2

anaconda-tb-JAZH2E: Text file, 213992 bytes

description:
:The following was filed automatically by anaconda:
:anaconda 13.21.149 exception report
:Traceback (most recent call first):
:  File "/usr/lib/anaconda/storage/partitioning.py", line 1033, in allocatePartitions
:    disklabel = disklabels[_disk.path]
:  File "/usr/lib/anaconda/storage/partitioning.py", line 906, in doPartitioning
:    allocatePartitions(storage, disks, partitions, free)
:  File "/usr/lib/anaconda/storage/partitioning.py", line 248, in doAutoPartition
:    exclusiveDisks=anaconda.id.storage.clearPartDisks)
:  File "/usr/lib/anaconda/dispatch.py", line 208, in moveStep
:    rc = stepFunc(self.anaconda)
:  File "/usr/lib/anaconda/dispatch.py", line 126, in gotoNext
:    self.moveStep()
:  File "/usr/lib/anaconda/dispatch.py", line 231, in currentStep
:    self.gotoNext()
:  File "/usr/lib/anaconda/text.py", line 602, in run
:    (step, instance) = anaconda.dispatch.currentStep()
:  File "/usr/bin/anaconda", line 1116, in <module>
:    anaconda.intf.run(anaconda)
:KeyError: '/dev/sda'

END: