Why RAID 5 is the Go-To Replacement for RAID 4 in Storage Configurations

Which RAID configuration is most frequently replaced by RAID 5?

• A. RAID 4
• B. RAID 0
• C. RAID 1
• D. RAID 2

Answer: (A)

RAID 5 is a popular choice in many storage environments, and one of the configurations it most frequently replaces is RAID 4. The reason for this lies in how both RAID 4 and RAID 5 handle data and parity. RAID 4 uses dedicated parity, where a single disk is used exclusively for storing the parity information for the data distributed across the other disks in the array. While this provides fault tolerance, it can create a bottleneck during write operations, as all parity writes must go to the single dedicated parity disk. This can negatively impact performance, especially in write-heavy environments. In contrast, RAID 5 distributes both data and parity across all disks in the array. This means that there is no single point of failure for parity data, and it allows for better performance by enabling multiple disks to be involved in the write operations. When one disk fails, the data can still be reconstructed from the remaining disks using the distributed parity information. This distribution not only enhances performance but also increases the efficiency of storage by utilizing all disks for both reading and writing data. Therefore, considering the performance advantages and more balanced distribution of storage and processing workload, RAID 5 is often seen as a worthy replacement for RAID 4 in various applications, effectively

Let’s tackle a topic that’s not just tech talk—it's about making your data storage more efficient! If you’ve been studying for the WGU ICSC3120 C952 Computer Architecture exam, you've likely encountered the question: Which RAID configuration is most often replaced by RAID 5? Spoiler alert: it’s RAID 4! But hang on, there’s more to this story than just answering questions.

RAID, which stands for Redundant Array of Independent Disks, is all about how we manage and protect our data. It’s like having multiple safety nets while you’re juggling those important projects. While RAID 4 had its time to shine, it faces some limitations that have propelled RAID 5 into the spotlight.

So, what sets these two configurations apart? Let me explain: RAID 4 utilizes a dedicated disk solely for parity information. Picture that single disk as a librarian tirelessly maintaining records while the other disks are hosting all the books—a noble effort, right? However, this setup can lead to a bottleneck during write operations. When data is being written, it all funnels through that one disk, which can really dampen performance in write-heavy scenarios.

Now, contrast that with RAID 5. Here’s the cool part—RAID 5 spreads both data and parity across all disks in the array. It’s like a collaborative team effort where every member pulls their weight. This means there’s no single point of failure, making it much more reliable and efficient. If a disk goes down, no worries! The remaining disks can work together to reconstruct the lost data using that distributed parity. This not only improves performance but also maximizes the use of available storage across the board.

But why does this matter? Well, if you’re gearing up for your exam or just looking to deepen your understanding of computer architecture, knowing these distinctions can help you paint a clearer picture of how storage solutions work. RAID 5’s performance boosts and efficient distribution can make a significant impact, particularly in environments where data is changed often. You want to be in the know, right?

As you prepare for the exam, remember that the shift from RAID 4 to RAID 5 isn’t merely about numbers or configurations. It’s about embracing efficiency and reliability in data security. Keep these nuances in mind; not only could they help you ace your exam, but they also provide insights into real-world applications. After all, understanding these concepts lays a solid foundation for your future in tech!

In a nutshell, RAID 5 is often the better choice over RAID 4 thanks to its improved performance and more balanced workload. So, the next time you see a question about RAID configurations, you’ll not only remember the correct answer but also why it matters. How cool is that?