I Have A 40 GIG HDD, which has an 6 GIG hidden Sony recovery partition and a C Drive with 12 GIGs used and 19 GIGS free space. I did a full disk (hidden partion plus 'C' partition) image back-up and the resultant image file is 23 GB large. Does that make sense, and why? 6+12=18 with no compression. I used 'normal' compression, etc. I am using TI9 v.3633 in Boot rescue CD mode. .