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RAID 10: Here, the “10” doesn’t mean “10th”, but rather that it combines the advantages of “RAID 1” and “RAID 0” (it’s also called RAID 1+0). But, if two drives fail, then the data may be irretrievable. If drive #2 dies, it can retrieve it from comparing the data on drives #1 and #3. The third hard drive serves as a summation of the data on drives #1 and #2. It gives increased speed, besides redundancy. RAID 5: This requires a minimum of 3 hard drives. If one drive dies, you still have all of the data on the other drive.ĭata redundancy in RAID 1, where Disk 1 mirrors the data stored on Disk 0 The second drive mirrors the content of the first drive. RAID 1: Here, you have the capacity and performance of one drive, but you also use a second drive for redundancy-to ensure that you don’t lose the data from the first drive. The contents of files A and B are striped across Disks 1, 2, and 3. This is only good in the event that you do frequent backups, to make sure that you can recover from a disk drive failing.Īn illustration of Data Striping, as performed in RAID 0. But if one drive fails, you lose the data on both drives. This doubles the read and write performance overall. It takes two hard drives and splits the data across the drives-a process called “striping”. But it doesn’t contribute to reliability, and actually makes you more vulnerable in the event of a hard disk failure. RAID 0: This setup focuses just on improving performance speed.

They differ in how they store the data to ensure better speed, as well as the redundancy that protects the data against disk failure.

We can distinguish between the various types of RAID setups. Select the right brand of the best RAID enclosure, and Read reviews of different RAID enclosures, and what customers are saying, See useful tips about that type of RAID enclosure, We’ve composed this buyer’s guide to help you make the right decision when selecting a RAID enclosure. It’s worth doing some research before buying a RAID enclosure. And that different enclosures will store different types of hard disks. You’ll also notice that these RAID enclosures will have several methods of storing information. They have to be protected from overheating-so RAID enclosures will have fans to keep the disks cool. You run the risk of not being able to retrieve any of your data!īut besides storing the data on several disks, they have to be kept securely. Compare that to the situation where you’ve put all of your data on one hard drive (putting all of your eggs in one basket), and it gets damaged. And, if there is sufficient “redundancy” (safeguards to retrieve lost data, by storing the same data in several places), you will be better equipped to retrieve data from the dead hard drive.

But, the bulk of your data will be on the other drives. This is because any one of the hard disks might suddenly die on you. The reasoning behind it goes like this: An array of many small disks may be more vulnerable to failures and loss of data. It refers to a method of storing computer data on several small, inexpensive hard drives, instead of on one large, expensive hard disk. RAID itself stands for “Redundant Array of Inexpensive (or “Independent”) Disks”. Instead of keeping the hard disks inside the computer case, you can keep them outside. A RAID enclosure is a place to store several hard disks, external to your PC.