Hi. I am trying to verify my install CD's without booting them. Would: md5sum /dev/cdrom work? On RedHat 7.3, it seems to fail with the ubiquitous I/O Error message. I cannot seem to shut the CDROM door without the CD amtomatically mounting. If I umount, the CD ejects. Of course, I realize that the suggested method is booting, then typing linux mddiacheck, but I wanted to do it withough bringing down the RedHat machine. Thanks, Lin __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com