The business owners you will be working with aren't likely to come from a technical background. Instead, they'll be from the business world, and they won't understand why a failed hard drive can't simply be replaced by a new or refurbished one.
In order to help your clients understand the process, you need to fully understand it yourself. You should know all about formatting a hard drive, loading the OS, configuring device drivers, loading software applications, customizing the OS and applications and restoring data.
Additionally, you will need to understand the types of warranties available to your clients through the vendor. Clients will assume that they should be able to get a warranty for little to nothing, but this is not usually the case. Since hard drives are generally only about $100 to $200, your clients may consider letting their guru do it themselves. You need to warn them, though, that this could take the guru, and possibly another person, away from their jobs for half a day or longer.
Learn more about educating your clients on vendor hard drive replacement when you read the entire article (link above).
Added by Computer Consulting 101