There are times when I want to use my zip drive with /dev/sda4 and shortly after a linux installation is done and the system goes online this is possible. However repeatedly about a week after system goes online, I find all /dev/sd* devices missing and this was with the automatic yum update facility turned on. I suspect either malware or root compromise. Is one of these the most likely cause or is there something else I don't yet know about. No, I don't go around moving editing or deleting anything in the /dev/ directory either.
