Like most people I have lost data in the past; hard drives failures, Windows viruses, etc. I’ve found it takes one big data loss for people to see the value of good backups. So it was for me. I saw the light in 1998 when I lost much of my archived data to an infected networked Windows computer. I didn’t run it very often, but when I left it running over night for the first time, the virus ended up deleting all the user files on my UNIX file server. Since then backups have been very important to me.