What is the size of the 42u cabinet and how many servers can be placed?
A Guide to Rackmount NAS – Sorted by Size – NAS Compares
14U Wall Mount Rack (19in) - 14 in Deep - Server-Racks | StarTech.com
Amazon.com: StarTech.com 42U 19" Open Frame Server Rack - 4 Post Adjustable Depth 22-40" Mobile - Free Standing Rolling Network/Computer Equipment Data Rack- Dell PowerEdge HP ProLiant ThinkServer (4POSTRACK42) : Electronics
Space requirements and system cabinet dimensions
19-inch rack - Wikipedia
Understanding Rack Mount System Sizing - everything RF
A Definitive Guide to 19-Inch Server Rack Sizes | Pure Storage