How to Master One of the Hardest Parts of the CompTIA Server+ Exam: Server Hardware Installation and Management

Server Hardware Installation and Management is Domain 1.0 of the CompTIA Server+ (SK0-005) exam, and it surprises a lot of candidates. It’s the smallest domain by weight, so it’s easy to skim. But it’s also the most detail-dense. In just three objectives, CompTIA packs in rack units, power connectors, fiber types, drive speeds, six RAID configurations, three storage networking protocols, and a list of maintenance tools.

It’s also hard if you don’t touch physical hardware every day. If you work mostly in VMs or the cloud, you may never have swapped a drive in a live array.

In this guide, we’ll break down what the domain covers, explain the concepts that show up most often, highlight common traps, and walk through two sample scenarios.

What Does Domain 1.0 Cover on the CompTIA Server+ Exam?

According to the CompTIA Server+ SK0-005 exam objectives, Domain 1.0 makes up 18% of the exam, or about 16 questions on a 90-question exam. It has three objectives, all written as “Given a scenario,” which means CompTIA expects you to apply the concepts, not just define them:

  • 1.1 Given a scenario, install physical hardware: Racking, power cabling, network cabling, chassis types, server components, RAID levels and types, drive media, and interface types.
  • 1.2 Given a scenario, deploy and manage storage: Shared storage (NAS and SAN) and capacity planning.
  • 1.3 Given a scenario, perform server hardware maintenance: Out-of-band management, local administration (KVM, crash cart, serial), firmware upgrades, hot-swappable hardware, and BIOS/UEFI.

Some of these may appear as performance-based questions, such as choosing a RAID level for a set of requirements.

Core Concepts You Need to Know

Racking, Power, and Cooling

Start with the basics of the rack itself. One rack unit (1U) is 1.75 inches of vertical space, and a full-height rack is commonly 42U. Server equipment is typically mounted in 19-inch-wide racks using rail kits, which can be sliding (so you can pull the server out for service) or fixed.

  • Weight distribution: Put the heaviest equipment, such as UPS units and large storage arrays, at the bottom of the rack to keep it stable.
  • Cooling: In a hot aisle/cold aisle layout, server fronts face the cold aisle to pull in cool air, and exhaust goes out the back into the hot aisle.
  • Power redundancy: Servers with dual power supplies should connect each supply to a different PDU, ideally on separate circuits, so one failure doesn’t take the server down.

Network Cabling

Know when to use copper and when to use fiber. 10GBase-T copper runs up to 100 meters on Cat 6a. Fiber handles longer runs and electrically noisy areas. Single-mode fiber has a narrow core and carries a laser signal over long distances, while multimode fiber has a wider core and is used for shorter runs, such as within a data center. LC and SC are the common fiber connectors you should recognize.

Drives and Interfaces

The objectives list SSDs (including read-intensive vs. write-intensive models and wear factors), HDDs at 15,000, 10,000, and 7,200 RPM, and hybrid drives. Faster spindle speeds mean lower latency and higher cost per terabyte. Write-intensive SSDs are rated for more writes over their life, which matters for databases and logging workloads.

For interfaces, focus on SAS vs. SATA. SAS is the enterprise interface, supporting dual ports and higher reliability. A SAS controller can run SATA drives, but a SATA controller can’t run SAS drives. That compatibility rule is a favorite exam detail. Always check the vendor’s hardware compatibility list (HCL) before adding components.

RAID Levels

RAID is the single most tested topic in this domain. Memorize this summary, where n is the number of drives:

  • RAID 0 (striping): Minimum 2 drives. Usable capacity is 100% of the total. No fault tolerance, so one failed drive loses the whole array. Used for speed only.
  • RAID 1 (mirroring): Minimum 2 drives. Usable capacity is 50%. Survives one drive failure in a two-drive mirror.
  • RAID 5 (striping with distributed parity): Minimum 3 drives. Usable capacity is n – 1 drives. Survives one drive failure.
  • RAID 6 (striping with double distributed parity): Minimum 4 drives. Usable capacity is n – 2 drives. Survives two drive failures.
  • RAID 10 (striped mirrors): Minimum 4 drives. Usable capacity is 50%. Survives one failure per mirrored pair, and offers strong write performance.
  • JBOD (just a bunch of disks): Drives are presented individually or spanned together. No redundancy.

Also compare hardware RAID (a dedicated controller, often with a battery- or flash-backed cache) with software RAID (managed by the OS). Parity RAID levels have a write penalty. Each write in RAID 5 takes four disk operations, and each write in RAID 6 takes six, which is why RAID 10 is often preferred for write-heavy workloads.

Shared Storage: NAS vs. SAN

This comparison comes up constantly:

  • NAS (network-attached storage): File-level storage shared over a regular network. Clients access it with NFS (common on Linux and Unix) or CIFS/SMB (common on Windows).
  • SAN (storage area network): Block-level storage that servers see as local disks, called LUNs. It can run over iSCSI (on standard Ethernet), Fibre Channel (a dedicated fabric using host bus adapters), or FCoE (Fibre Channel frames carried over Ethernet).

A quick way to remember it: if the server needs to format the storage with its own file system, as a database or hypervisor often does, you’re looking at a SAN. For capacity planning, account for growth, RAID overhead, and snapshots, not just today’s data.

Out-of-Band Management and Maintenance

Out-of-band management lets you control a server even when its operating system is down or hung. A baseboard management controller (BMC), such as Dell iDRAC or HPE iLO, provides remote console access, power control, virtual media mounting, and hardware health data over a dedicated management port. An IP KVM gives similar remote console access for servers without a BMC. In contrast, in-band tools like RDP and SSH only work when the OS and its network stack are running.

Locally, you might use a KVM switch, a crash cart, or a serial console. For maintenance, know which parts are commonly hot-swappable (drives, power supplies, and fans), why firmware should be updated in a tested, documented order, and which BIOS/UEFI settings matter. UEFI supports Secure Boot and booting from GPT disks larger than 2 TB, which legacy BIOS with MBR can’t do.

Common Traps in Server Hardware Questions

  • Mixing up usable capacity: Candidates often subtract one drive for RAID 6 or apply 50% to RAID 5. Write out the formula every time.
  • Assuming RAID 10 survives any two failures: It survives two failures only if they’re in different mirrored pairs. RAID 6 survives any two.
  • Treating RAID as a backup: RAID protects against drive failure, not deletion, corruption, or ransomware. If a question asks about recovering deleted files, RAID isn’t the answer.
  • Choosing an in-band tool when the OS is down: If the server is unresponsive, RDP and SSH won’t work. Look for the out-of-band option.
  • Confusing NAS and SAN protocols: NFS and SMB are file-level (NAS). iSCSI and Fibre Channel are block-level (SAN).
  • Pulling the wrong drive: In a degraded array, removing a healthy drive instead of the failed one can destroy the array. Questions reward confirming the failed drive with the fault LED and RAID management tool before swapping.

Sample Scenarios: How to Reason Through Domain 1.0 Questions

Scenario 1: Choosing a RAID Level

Consider a question where an administrator has six 4 TB drives for a new file server. The requirements are that the array must keep running if any two drives fail and that usable capacity should be as large as possible within that rule.

RAID 5 gives 20 TB (five drives’ worth) but survives only one failure, so it’s out. RAID 10 gives 12 TB and might survive two failures, but not if both drives in one mirrored pair fail, so it doesn’t meet “any two.” RAID 6 gives 16 TB (six drives minus two for parity) and survives any two failures. RAID 6 is the best answer. The trap is RAID 10, which sounds more robust but doesn’t meet the exact wording.

Scenario 2: Reaching a Hung Server

Now consider a question where a server at a remote branch office stops responding. Remote Desktop connections fail, and ping to the server’s production IP address times out. No IT staff is on site. What should the administrator do first?

Driving to the site is possible, but it isn’t the best first step, and in-band tools won’t help while the OS is unresponsive. The administrator should connect to the server’s BMC through its dedicated management port. From there, they can view the console to see whether there’s an error on screen, check hardware health logs, and perform a controlled power cycle if needed.

How Domain 1.0 Connects to the Rest of the Exam

Hardware knowledge shows up across all four domains:

  • Domain 2.0, Server Administration: Partitioning (GPT vs. MBR) depends on your firmware (UEFI vs. BIOS), and virtualization resource planning depends on the CPU, memory, and storage you installed.
  • Domain 3.0, Security and Disaster Recovery: BIOS/UEFI passwords and boot order are hardening steps, and understanding RAID vs. backups is key to recovery questions.
  • Domain 4.0, Troubleshooting: Objectives 4.2 and 4.3 cover hardware and storage failures directly, including misconfigured RAID, failed controllers, cache battery failure, and backplane failure.

A Focused Study Plan for Domain 1.0

  1. Build your RAID table from memory. Write minimum drives, usable capacity, and fault tolerance for each level until you can do it in under a minute. Then practice capacity math with different drive counts and sizes.
  2. Make a NAS vs. SAN comparison sheet. Include file vs. block, the protocols, and a typical use case for each.
  3. Get hands-on where you can. Watch vendor videos on racking and drive replacement, explore a BMC interface if your workplace has one, or build a software RAID array in a Linux VM with virtual disks.
  4. Practice by domain, then mix it up. Use Pocket Prep’s Build Your Own Quiz to focus on server hardware questions. Then review with the Missed Questions quiz and switch to mixed quizzes so you can spot hardware concepts when they appear inside troubleshooting scenarios.

Start Preparing for the CompTIA Server+ Exam With Pocket Prep

Domain 1.0 rewards precision, and precision comes from practice. Pocket Prep’s CompTIA Server+ practice questions give you 530 exam-style questions across all four domains, each with a detailed explanation that walks through why the right answer is right and why the others fall short. Use Weakest Subject to see whether hardware is holding you back, and try Level Up to build your skills one step at a time. Keep at it, and those RAID questions will start to feel easy.