The word RAID is an acronym that stands for Redundant Array of Independent Disks. RAID is a storage technology that combines multiple drive components into a single logical storage volume. RAID is commonly used in laptops, desktops, and RAID-enabled storage devices such as external hard drives, USB-based storage devices, and storage area networks.
A RAID storage device is a logical collection of hard drives that appears to the operating system and other software as a single drive. RAID is not intended to be a backup solution. RAID is intended to provide fault tolerance and data redundancy, providing protection against the loss of data should one of the drive components fail. The raid data recovery can be implemented on a variety of hardware and software platforms. This guide covers the ins and outs of RAID and how you can use it to protect your important data and recover from a RAID failure.
The advantages of RAID are numerous.
– Data can be read from the surviving disks in a RAID set to rebuild data that was lost when one of the disks failed.
– The maximum storage size is much greater than with a single disk.
– Fault tolerance differs depending on the type of RAID implementation, but no matter which type of RAID you have, there is always some level of fault tolerance and data redundancy.
– Speed increases linearly with more disks.
– More controlled cooling environment for hard drives because they aren’t as tightly packed together as in a single drive unit.
While RAID has many advantages, it does have some disadvantages. The higher the level of RAID redundancy, the more expensive the cost per gigabyte becomes. This is because more hard drives are needed to implement a higher RAID level and they need to be fast enough to keep up with the demand of data being written to them. While this may not be a concern for storage devices connected directly to a server, it could be an issue for desktop or laptop users looking for external storage solutions.
Another disadvantage is that should you suffer a RAID-related failure, you will lose all your data as there is no backup component in RAID systems. When one drive fails, any unrecoverable data on that drive will be lost while the other drives maintain their original capacity
How to set up RAID
To set up RAID, you’ll need to create a RAID device on either your hard drive or an external drive.
In this example, we will create a RAID 1 device on the C: drive.
In Windows 10, for example, open the Control Panel and click on “Administrative Tools.” From there, click on “Create and Format Disks,” which will open a window called “Disk Management.”
To create a new partition that is part of the RAID 1 device, right-click on the unallocated space and select “New Simple Volume.” In the next window that pops up, type in a volume label (e.g., DATA) and then select the option to use all available space. Once you do that, click OK and it will go through creating your new partition.
After it’s done creating your partition, make sure to give it a drive letter (e.g., E). Then right-click on E: and choose “Change Drive Letter and Paths” if you want to change what is displayed as the letter for this partition. Finally, right-click on E: again and choose “Add Mirror” to add this partition as a mirror to the currently existing one.
How to recover from a RAID failure
Despite RAID’s many advantages, it does have one major downside: the loss of all data if a single drive fails. To protect against this, it may be necessary to implement some form of backup strategy. However, if you don’t have a backup strategy in place and one of your drives fails, what are your options? They are generally limited to three ways:
– Remove and replace the failed disk
– Reformat the disk and reinstall the OS
– Restore from a backup
The first option is ideal if you have another RAID volume with enough space for all the data on your other drives. The second option is ideal if you’re running Windows XP or earlier because XP doesn’t need an operating system to boot from. The third option is ideal if you have a backup of your data somewhere else (and not just on another drive within the same RAID volume).
For most people, it’s difficult and potentially expensive to maintain multiple RAID volumes for offsite backups. That leaves them with very few good options when their RAID array crashes. If you can’t restore from a backup or remove and replace the failed disk, then your only two options are reformatting and reinstalling an operating system or restoring from an outside source like an external hard drive or Time Machine backup–both of which will result in data loss.
RAID is a type of storage that combines multiple disks into one logical unit. RAID is a great way to add redundancy and performance to your storage. But like with any storage system, RAID has its own set of disadvantages and failures that you should be aware of. This guide will walk you through the process of setting up RAID as well as how to recover from a RAID failure.