![]() ![]() In the event that either drive fails, you can then replace the broken drive with little to no downtime. If you completely lose a drive, you can still stay up and running off the additional drive. The point of RAID 1 is primarily for redundancy. While RAID 1 is capable of a much more complicated configuration, almost every use case of RAID 1 is where you have a pair of identical disks identically mirror/copy the data equally across the drives in the array. As an example, with the 2.5% annual failure rate of drives, if you have a 6 disk RAID 0 array, you've increased your annual risk of data loss to nearly 13.5%. But it should not be used for anything other than that. You can use it for cache or other purposes where speed is important and reliability/data loss does not matter at all. There are rarely a situation where you should use RAID 0 in a server environment. This RAID type is very much less reliable than having a single disk. ![]() The loss of any individual disk will cause complete data loss. The downside to RAID 0 though is that it is NOT redundant. An individual file can then use the speed and capacity of all the drives of the array. This will greatly increase speeds, as you're reading and writing from multiple disks at a time. RAID 0 is taking any number of disks and merging them into one large volume. What Are the Types of RAID? RAID 0 (Striping) ![]() 5% during each year of is operation, which significantly reduces the risk compared to a spinning HDD.īecause of the dramatic difference between the technologies of HDDs and SSDs, it’s important to state that some RAID implementations that are great for HDDs are not for SSDs, and vice versa. As they have no moving parts, their ability to both write and read data on them is significantly faster than on a HDD (at least 8-10x faster.) And their failure rate is roughly. SSDs are typically chosen in situations where speed and performance take a priority to cost considerations. In short, if you value your data, you are going to need to implement some methodology to help protect it from drive failure. This has been proven by multiple reports and no specific manufacturer or model has a dramatic variation from that 2.5% rate. Typically, a mechanical hard drive has a 2.5% chance of failure each year of its operation. RAID is meant to help alleviate both of these issues, depending on the RAID type you use. Due to physical limitations and the mechanical nature of many high speed moving parts contained in them, HDDs also have a relatively high failure rate compared to SSDs. Spinning disk, mechanical hard drives, or Hard Disk Disks (HDDs) are typically chosen in situations where needs such as speed and performance fall second to cost. Now, the exact speed and reliability you'll achieve from RAID depends on the type of RAID you're using.Ī Short Overview of Spinning Disk and Solid State Drives The idea then is that these disks working together will have the speed and/or reliability of a more expensive disk. That means that RAID is a way of logically putting multiple disks together into a single array. RAID stands for Redundant Array of Inexpensive Disks. If you still have further questions, don't hesitate to contact us. So, I figured I'd take a look at the blog posts we have made in the past and release an updated version to include modern advances. We have been asked by many customers about RAID, what it is, how it affects them, and how they can get the best reliability and performance out of it while keeping an eye on their bottom line. Steadfast has been providing dedicated servers with RAID configurations for at least a decade, and while RAID is a widely used technology, how it is implemented has changed a great deal with the advent of Solid State Drives (SSDs).
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