apcmag.com has a complete introduction to server, including to blade servers. They cover all aspect about servers. From form-factor to the server-management.
Here’s a complete links:
- Introducing Servers
- A Typical Rack Server
- Opening it up
- Heatsink, CPU and fans
- RAM, PCI Express and Graphics
- Power
- UID Led, USB and Panel
- Storage
- Cables
- Management