Server Fundamentals: What Every Engineer Should Know

Server vs PC

Servers differ from desktop PCs in several dimensions:

Form factor – servers are rack‑mountable and have no built‑in display.

Security and expandability – servers provide hot‑swap drive bays, additional NICs, GPUs and other expansion slots.

Operating environment – servers run Linux and are managed remotely (e.g., Secure CRT), while PCs typically run Windows and are operated via local peripherals.

Availability – servers are designed for 24 h continuous operation.

Appearance classification

Physical servers are categorized by height measured in rack units (U), where 1 U = 4 cm. An 8 U server occupies 32 cm from the rack base.

Architecture classification

Based on instruction‑set architecture, servers fall into two groups:

CISC (Complex Instruction Set Computing) – also called x86 servers; mainstream models use Intel or AMD CPUs.

RISC (Reduced Instruction Set Computing) – includes ARM, MIPS and Power architectures. ARM chips are produced by Huawei, Apple (M1) and other vendors.

Front panel

The front panel provides status LEDs, a power button and drive bays but no monitor. The number of stacked panels corresponds to the server’s U height.

Rear panel

The rear panel hosts networking ports, power connectors and out‑of‑band management interfaces. ILO (HP) and IPMI (generic) provide equivalent remote‑management capabilities.

Internal components and parameters

Internally, servers share CPUs, memory and storage with PCs, but typically include server‑specific hardware such as RAID controllers.

Key identification parameters are:

Brand (e.g., Inspur)

Model

Serial Number (SN) – unique identifier for querying detailed information

Asset Number (PN) – vendor‑defined identifier used for asset management and automation

Configuration – typically defined by architects and procurement teams

Code example

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服务器
服务器与 PC 机