I have several books that came with floppy disks or CD-ROMs. I’m worried about whether they’ll last and wanted to make copies of them. It is trivially easy on Linux:

dd if=/dev/scd0 of=/iso/book.iso

I got a rawread script that supposed solves some compatibility problems. I found that dd worked fine on two disks that the script had problems with. The script is called with

rawread.sh /dev/scd0 >book.iso

To mount a image (mkdir /media/iso directory first):

sudo mount -o loop book.iso /media/iso

For floppies, use /dev/usb0 (I have a usb floppy drive) and .img as the extension.