RAID Storage Solutions & RAID Arrays | WD

RAID Storage Solutions & RAID Arrays | WD

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Overview

RAID Storage

Storage that matches your specific needs for system performance, data redundancy, or both.

Shop RAID Solutions Home Solutions RAID Storage Solutions

Overview

RAID Storage

Storage that matches your specific needs for system performance, data redundancy, or both.

Shop RAID Solutions What is RAID Storage? RAID – or Redundant Array of Independent Disks – is a type of storage that writes data across multiple drives within the same system. Different configurations are expressed as numbers, such as RAID 0, RAID 1, or RAID 5. Each RAID type gives users different benefits — increased performance, greater fault tolerance, or a combination of both — depending on how it writes and distributes your data.

Pro performance Get the performance and protection you need for data-intensive creative workflows.

Production power RAID solutions can be configured for the most rigorous uses, such as time-sensitive, data-sensitive post-production workflows.

Cloud-friendly Cloud-ready RAID storage can be ideal for both business and home users that want to access their data from anywhere.

Fault tolerant RAID can deliver high data protection and redundancy whenever uptime and availability are critical needs.

Who Needs RAID?

You may want to try one or more RAID configurations if you need to:

Maintain maximum uptime and availability on your system Work with large files without slowing down operations Have data redundancy to protect important information Increase the potential mean time to failure of your system RAID Storage vs. Data Backup While RAID can make your data storage more powerful and resilient, it’s not the same thing as data backup. RAID arrays spread I/O operations across multiple disks in order to read and write data faster, or to mirror data on one drive across other drives, which allows the whole system to continue operating without data loss if one of those drives fails.

On the other hand, data backup helps you restore lost files. So, while data backup solutions are meant to get you back on your feet in the event of total data loss, RAID is designed to help avoid that kind of loss in the first place. Similarly, while RAID makes your overall storage system more resilient, it still only counts as one copy of your data.

Understanding RAID Configurations Learn more about the most popular RAID configurations to help you understand your needs, as well as narrow down your requirements for performance, data protection, and capacity.

RAID 0: High Performance RAID 0 offers the fastest read/write speeds and maximum availability of raw storage capacity. Although RAID is typically associated with data redundancy, RAID 0 does not provide any. However, it does provide the best performance of any RAID level.

It achieves this by breaking up data into smaller groups and storing it on separate disks. For example, in a two-disk array, the data is split evenly across the two disks, doubling your speed. In a four-disk array, you can quadruple your speed, and so on.

Featured Products {{productReferenceObject.pageTitle}} {{productReferenceObject.pageTitle}} RAID 1: Solid Data Protection RAID 1 is an excellent option when data protection and redundancy is your primary goal. This RAID type stores your data on one disk and then keeps a separate copy of that data on each of the available remaining disks.

This means that if one disk goes down, you still have your data ready to go. This approach gives you the usable storage capacity and write speeds of one disk but offers strong data protection.

Featured Products {{productReferenceObject.pageTitle}} {{productReferenceObject.pageTitle}} RAID 5: Balanced Data Protection and Speed Requiring a RAID system of three or more drives, RAID 5 offers the best of both worlds, balancing performance and redundancy.

It does this by splitting data into groups across all available drives and creating distributed parity, where data calculations are stored across the drives so that any one drive may fail, and the data — or parity — on the other drives can reconstitute what was lost on the failed drive.

This is a faster setup than a RAID 1but allows for single-disk fault tolerance (no matter how many are in the array) unlike RAID 0, providing both speed and data protection.

Featured Products {{productReferenceObject.pageTitle}} {{productReferenceObject.pageTitle}} RAID 10: High Reliability and
Performance RAID 10 nests at least two RAID 1 sets within a RAID 0 configuration. This blends performance with potentially higher fault tolerance. Mirroring lends additional redundancy, which means that you can retain your data even if you lose up to half your disks — provided your mirrored copy does not fail.

This is why businesses and other professional teams use RAID 10 where uptime and availability are critical for intense workflows.

Featured Products {{productReferenceObject.pageTitle}} {{productReferenceObject.pageTitle}} JBOD & JBOF: Flexible
Customizability and Expansion JBOD and JBOF, or Just a Bunch of Disks and Just a Bunch of Flash, respectively, open up additional paths to flexibility with a RAID storage device.

While arrays using numbered RAID types generally require reformatting to add new drives, JBOD and JBOF allow users to expand or swap drives without reformatting.

JBOD can do this because each disk acts independently, and each disk is seen as its own volume. This also means the risk of data loss is contained to one drive rather than the entire array.

With Spanning, data is only kept within each disk, but the system make all disks appear as one larger "logical" volume — almost like they're one big drive. Spanning is more flexible than RAID and simpler to use than JBOD, but it can be more complex than JBOD if you want to move drives.

Featured Products {{productReferenceObject.pageTitle}} {{productReferenceObject.pageTitle}}  Adds SpeedAdds RedundancyMin. Drives RequiredRAID 0✔ 2RAID 1 ✔2RAID 5✔✔3RAID 10✔✔4JBOD & JBOF  1 Selecting the Right RAID Solution Find the RAID product that’s right for you, whether you’re looking to improve performance, maximize data redundancy, or both.

RAID Solutions to Boost System Performance RAID Solutions to Improve Data Redundancy & Fault Tolerance RAID Solutions to Maximize Performance & Data Redundancy RAID Solutions for JBOD & JBOF RAID Capacity Calculator Ready to test out your ideal RAID configuration? Use our RAID Capacity Calculator to select your RAID type and see how much available space you’ll have based on your requirements.

Calculate More About RAID

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Frequently Asked Questions What is RAID storage? RAID, which stands for Redundant Array of Independent Disks, organizes the I/O operations across multiple drives to deliver certain benefits to users — all within a single system. By combining and coordinating more than one hard drive — or, in some cases, SSDs — RAID arrays allow you to leverage the potential of multiple storage devices in order to combine performance and/or automated redundancy in a single convenient, high-capacity, affordable package.

Users can get these benefits by selecting the right RAID type. Some RAID configurations read and write across multiple disks in order to boost system performance and maximize throughput. Other configurations mirror data sets across multiple disks, which makes RAID systems more fault tolerant by creating built-in data redundancy.

What is the best type of RAID storage for me? Selecting the right type of RAID storage depends on knowing how you’ll use it and what benefits you’re looking to unlock. There are a wide variety of different RAID types, with options such as RAID 0, RAID 1, RAID 5, and RAID 10 being the most common. However, there are others that can be a good fit for more experienced users, depending on your particular workflow and the environment in which you’re using your RAID system.

For example, if you’re looking for RAID configurations that can boost your system performance, check out some of these solutions. If you’re interested in improving data redundancy and your overall storage fault tolerance, take a look here. And, if you’re interested in striking the right balance of both, keep reading here.

What are JBOD and JBOF? JBOD, which stands for Just a Bunch of Disks, and JBOF, which stands for Just a Bunch of Flash, are configurations of hard drives and SSDs in which multiple drives are consolidated within a single device, but each drive acts independently of the others.

Essentially, each disk is its own logical volume, although the system identifies them as if they were separate external drives. This adds critical flexibility for certain scenarios, either using drives of different capacities, or adding drives later on without required reformatting.

However, it’s worth noting that JBOD and JBOF don’t deliver additional performance or redundancy.

What is Spanning? With Spanning, the multiple drives of a JBOD setup are combined into one logical volume on your system. In the read/write process, this means that your files fill one drive, then the next, and then the next after that, and so on.

It’s similar to RAID 0 in that you get the greatest possible capacity in a single volume. However, because the data is not broken up or striped, failure occurs at the level of individual drives rather than across the entire array.

Also note that Spanning does not confer any performance boost.

Are there other types of RAID like RAID 2 or 3? Why don't you talk about them here? Yes. It may seem like the RAID type numbers are random, but other RAID types exist. We don't discuss them above, nor do you readily find devices that support them, because generally they've either been replaced by the RAID types you find explained here, or fit very specific, niche uses. You may also see ones with an "E" added or other letters; these may represent variations of existing types that are more complex and/or proprietary. If you want to learn more about these, we recommend that you refer to product information on a device that supports them.

What are RAID 50 and 60? I see you have a product that supports them. RAID 50 and 60 are very similar to RAID 10, as they are all "nested" RAIDs. The first number in the type — 5 and 6, respectively — represents what subset they are built with, either RAID 5 arrays or RAID 6 arrays. The second number represents the RAID type the first one is "nested" into; in this case, it's RAID 0.

Let's dive a bit deeper.

So, with RAID 50:

Two RAID 5 subsets stripe across each other in RAID 0.  With eight drives, four drives act as RAID 5 with their own parity. Another four do the same with data split between two sets.  Any one of the four drives in each set could fail. That's one to two drives — two if they're not within the same subset. So, with RAID 60:

Two RAID 6 subsets stripe across each other in RAID 0. With eight drives, any one of the four drives in each set could fail. That's two to four drives — four if two are from one subset and two are from the other subset. RAID 50 vs. RAID 60:

RAID 50 will have faster performance than RAID 60. RAID 60, like RAID 6, has parity for all data written twice. That's why you "lose" two disks of capacity per RAID 6 subset. With RAID 50, it's one disk per subset. Nested RAID types provide subtle differences to the standard RAID types to allow for better performance and/or potentially higher fault tolerance. Note, however, that they generally require more disks.

Featured Products {{productReferenceObj.badgesInfo.tagTitle}} {{productReferenceObj.pageTitle}} Capacity: {{productReferenceObj.capacity}} Starting at {{productReferenceObj.minPricedSkuObj.prices.sale.amountFormatted}} / {{productReferenceObj.minPricedSkuObj.prices.sale.billingPlanName}} {{productReferenceObj.minPricedSkuObj.prices.list.amountFormatted}} Shop Now {{productReferenceObj.cpJson.ctaLabel}} {{productReferenceObj.cpJson.ctaLabel}} RAID Capacity Calculator1 Ready to test out your ideal RAID configuration? Use our RAID Capacity Calculator to select your RAID level configuration type, drive quantity, and drive capacity size to see how much available space you’ll have based on your requirements.

RAID type - Select - RAID 0 RAID 1 RAID 5 RAID 6 RAID 10 RAID 50 RAID 60 JBOD/JBOF Spanning Drive quantity - Select - 1 2 3 4 5 6 7 8 9 10 11 12 Drive size2 - Select - 1 TB 2 TB 4 TB 6 TB 8 TB 10 TB 12 TB 14 TB 16 TB 18 TB 20 TB 22 TB 24 TB Calculate Raw available capacity – Available for storage – Used for redundancy – Explore RAID products

Note that this setup results in a nested RAID. This means you're creating at least two RAID sets that sit within another. For example, RAID 10 means you have two RAID 1 sets that sit within a RAID 0, while RAID 50 means two RAID 5 sets within a RAID 0, and so on. This calculator assumes you are creating a typical setup with two subsets, though it would be possible to create more with enough disks.

For JBOD and JBOF, raw capacity is not a single "name space" or volume. Each drive is individual of each other and mounts as such. With Spanning, separate disks are "merged" into a single "logical" volume, so your system only mounts one volume. This is similar in capacity to RAID 0, although the data is not split across the drives. This means there is no performance boost. However, if a drive fails, only the data on that drive is lost rather than losing everything within the larger volume.

For JBOD and JBOF, raw capacity is not a single "name space" or volume. Each drive is individual of each other and mounts as such. With Spanning, separate disks are "merged" into a single "logical" volume, so your system only mounts one volume. This is similar in capacity to RAID 0, although the data is not split across the drives. This means there is no performance boost. However, if a drive fails, only the data on that drive is lost rather than losing everything within the larger volume.

1. This RAID Capacity Calculator is provided for illustrative purposes only. Capacity is calculated based on parameters selected in the tool. Please refer to individual device specifications to confirm RAID support, drive quantity allowed, and capacity support. 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.

2. To achieve optimal RAID capacity and performance, we advise using disks with the same capacity in your array. Using different-sized drives will result in wasted, unused space for the larger capacity drives. This does not apply for JBOD/JBOF setups since the drives function independently of each other.

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