Ghost doesn't like RAID arrays unless setup a certain way. If the array is configured on the controller's hardware and not through software and is set where your OS sees the drive as one physical drive.
If the array is a softraid youre basically out of luck.
There is a known and documented issue with Ghost 7.5 and SATA drives. Ghost 7.0 usually works but has other issues sometimes with Windows XP's version of NTFS.