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Advice on RAID setup

Started by Chris, March 21, 2017, 04:42:42 PM

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Chris

Hi guys,

We having a debate at work as to which RAID is best for our new servers.

Currently we use same spec servers so nothing really changes.

6 x 1TB SSDs in HW RAID 10 with writeback BBU array to host 2 x cPanel VPS servers with around 500 accounts each, litespeed and mariadb.

Now the discussion is do we switch from Raid 10 to RAID 6 with SSDs. The argument we having is that it is practically not noticeable with SSDs as it is already that fast and the extra space and redundancy could help?

For SATA there was obviously a need but SSD still ? Recommendation.

Kailash

If you are not looking for additional free space, RAID 10 is recommended. If you want more space with 6 x 1 TB SSDs, you can go for RAID 6 array.

Akshay_M

Setting up a RAID (Redundant Array of Independent Disks) configuration can provide various benefits such as improved data performance, redundancy, and increased storage capacity. However, choosing the right RAID level and properly configuring it requires careful consideration of your needs and goals. Here's some advice to help you with your RAID setup:

Understand RAID Levels:

There are several RAID levels, each offering different benefits and trade-offs. The most common RAID levels are RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Research and understand the characteristics of each level before deciding which one suits your needs.
Determine Your Goals:

Define your primary goals for setting up RAID. Are you looking for improved performance, data redundancy, or a combination of both? Your goals will influence the RAID level you choose.
Assess Your Data:

Consider the importance of your data. If data security and redundancy are crucial, RAID 1, RAID 5, or RAID 6 might be more suitable. If performance is your priority, RAID 0 or RAID 10 could be a better choice.
Select the Right Drives:

Choose reliable, high-quality drives from reputable manufacturers. Drives of the same capacity and specifications are ideal for maintaining uniform performance and compatibility.
Backup Your Data:

RAID is not a substitute for regular backups. While RAID can provide redundancy, it won't protect you from data corruption, accidental deletions, or catastrophic events. Always have a robust backup strategy in place.
Consider Expansion:

If you plan to expand your storage in the future, choose a RAID level that allows for easy expansion. RAID 5 and RAID 6 are better suited for expansion than RAID 0.
Controller Consideration:

Some RAID configurations require a hardware RAID controller, while others can be managed by the operating system. Make sure your hardware or software supports the RAID level you're interested in.
Performance vs. Redundancy:

Keep in mind that RAID configurations offering redundancy might sacrifice some performance compared to RAID 0. Balance your need for redundancy with the performance you require.
Hot Spare and Rebuild Time:

RAID levels that include redundancy (such as RAID 1, 5, and 6) can rebuild data in case of drive failure. Consider configuring a hot spare—a spare drive that automatically replaces a failed drive—to minimize downtime during rebuilds.
Testing and Monitoring:

Regularly test and monitor your RAID setup for any signs of issues or degradation. Many RAID controllers and software utilities provide monitoring tools.
Documentation:

Keep thorough documentation of your RAID setup, including the RAID level, drive specifications, controller information, and configuration settings. This will be helpful in case you need to troubleshoot or expand in the future.
Seek Expert Advice:

If you're unfamiliar with RAID or unsure about your setup, consider seeking advice from IT professionals or experts who have experience with RAID configurations.
Remember that RAID configurations involve hardware and software components that can interact differently based on your setup. It's important to thoroughly research and understand the specific RAID level you're interested in and how it aligns with your storage and performance needs.

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