In a file server the most important components would be the hard drive. You will want fast drives, preferably configured in RAID 5 or 6 to prevent data loss. You will also want a fast network uplink, such as gigabit ethernet if your network can support it. In general you wont need very much RAM or a super fast processor.
Software,and power Anonymous
Some of the components that are utilized by server computers are things such as a motherboard, processor, and hard drives. Other components would include graphics, power supply and network connections.
To verify the compatability of hardware components with the operating system.
Printer Server and the Printer DriverPrint Server and the Print Device. The printer driver is software based.
The processor; otherwise it couldn't do any work.
no much because all the work is processed at the server level and result are sent to client
process server process server
email system is a complex of client and server hardware and software
memory
1 GHz processor, 512 MB of RAM, 10 Gb Hard Drive
Hot server rooms will cause the premature failure of hardware components such as hard drives and CPUs. A hot room will make it more difficult for servers' cooling systems (usually fans) to keep components from thermal expansion, which begins to cause errors and crashes.
A great blog about server hardware and everything else computer hardware is Virtualized Geek. The blog has daily updates with all of the newest hardware information.