I have started to receive this error message: "Failed to read from the sector 26,500,16 of hard disk 2" which prevented Acronis from completing a scheduled incremental backup. I tried to explore the disk with Explorer - the program reported that Disk 2 was not formatted. I formatted. Then I ran Chkdsk /f which reported no errors with the disk that I could see. Then I tried to create a new image using "Automatic" which failed with the above error message. Next I tried to create an image using Fixed Image Sized for a CD. This apparently worked - but I could not explore the image (16 files) - when I clicked on #1 the Acronis protested that this was not the last disk in the image. Then I clicked on #16 (the last) and Acronis protested "Can't assign drive letter to a single file" - or some such. What's going on? =================== I have manually copied a variety of large files from my C: drive to hard disk 2 (F-drive). All these seem to function normally.