I want to run fsck on a disk image before I use it to restore (replace) a corrupted volume. Using Terminal, what would be the proper command, syntax, and options for this operation? I've just recently become acquainted with Terminal and line commands, so syntax and specific options aren't part of my computing vocabulary. I'm using Terminal 2.1.2, bash, OS 10.6.8. Ultimately, I'm trying to restore an image to a secondary startup volume (external drive). The image is mounted on my desktop and I want to check it for errors before I use it. Disk Utility runs "repair disk" successfully but the integrity of the image is suspect.