Storage Switzerland’s George Crump is lead analyst of Storage Switzerland, an IT analyst firm focused on the storage and virtualization segments. The challenge is the virtual server project tends to be successful and before you know it you have three to four times as many virtual machines as you originally planned for. In many environments additional virtual machines are “free” There is often a site license for the operating system in place and there are plenty of CPU resources to go around. The one place there is always an “cost” though is storage capacity. The problem with adding capacity to a traditional storage system is that every time you do so performance gets worse.”]
Source: https://www.darkreading.com/database-security/selecting-storage-for-server-virtualization—capacity