Public bug reported:
can't say much more. After upgrade from 13.10 some error messages about
applications that can't be upgraded or that fail.
ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libswscale-extra-2 (not installed)
ProcVersionSignature: Ubuntu 3.11.0-26.45-generic 3.11.10.12
ok, so install mdadm : sudo apt-get install mdadm
BTW, if you have started using the Palimpsest Disk Utility, your disks may
already have been partitioned for the RAID. If so, you can't use Palimpsest to
remove the partitions.
Use Gparted to clean up the mess and remove any partition.
Then go
