I have two new Dell Optiplex 755s with single SATA drives (no RAID). The Acronis bootable CD image (build 8101) gives the E00101F4 error unless I go into the BIOS and change the Dell defaults in the Drives/SATA Operation section from RAID autodetect/AHCI to "Legacy" mode. I have read other threads going back a year where they changed from AHCI to ATA mode and that worked for them. I had a similar issue with a Ghost boot CD and had to change it to the RAID autodetect/ATA setting to allow the ghost CD to detect the SATA drives. BTW.. I worked phone support for Dell from 11/06 to 5/08, and the internal knowledge base (DellServe) suggests changing RAID autodetect/AHCI to RAID autodetect/ATA, and vise versa, for hung boot issues. Also turning off the SATA optical drives allowed booting when Symantec AV was trying to scan the drives.