bacaartikeldisiniaja -- Technology we love until something goes wrong and we end up screaming at our computer screens. If you've ever lost data, you know how much time, money, and headache it can take to recover it. Especially when it comes to business. No need to worry about data recovery.
First used in 1988, the acronym RAID stands for Redundant Array of Inexpensive (or Independent) Disks. A RAID is a set of hard drives that act as a storage unit, also known as a "disk array". In general, drives can be any random access storage system, such as: B. Magnetic hard drives, optical storage, magnetic tape, etc. RAID has several functions, such as providing a way to access multiple disks grouped together and appear as a single device. It distributes data access across these disks, reduces the risk of data loss in the event of drive failure, and improves access times.
Can RAID fail?
RAID definitely provides better data protection than non-RAID disk systems. However, managing hard drives and distributing data across them can be complicated. Complex redundant systems can fail. In most cases, it is not due to the technology or array design used, but more likely due to improper application of these systems, creating a single point of failure that causes catastrophic data loss.
No matter how well a RAID system is designed or implemented, there is one factor that causes problems with RAID data arrays. It's the human factor. The more complex the system, the more likely it is that errors will occur.
Multiple drives in the array can fail.
Arrays are usually packaged in one case, so physical damage can affect multiple drives and control electronics. Many people don't back up RAID systems because they are "fault tolerant", but they are not "fail safe".
Think of a RAID system as insurance for your data, protecting you from drive failure. Drive failures result in employee downtime, lost sales, customer costs, lost opportunities, data recovery and re-entry costs, and intangible costs due in part to work day interruptions and loss of RAID data. Not to mention the recovery cost.
There are several ways to store data on different RAID levels.
RAID 0, also known as data striping, spreads data across multiple drives, resulting in more data overall. However, it does not prevent data loss as there is no data redundancy. RAID 1, also known as drive mirroring, works by simultaneously copying data to a second drive, so if one drive fails, no data is lost.
RAID 2 uses a Hamming error correction code and is recommended for use with drives that do not have built-in error detection.
RAID 3 removes data at the byte level across multiple drives and stores parity (a form of data protection used to reconstruct data from failed drives in a disk array) on a single drive .
RAID 4 distributes data across multiple drives at the block level and parity is stored on one drive. Parity information allows recovery from single drive failures. RAID 5 is similar to RAID 4, except it distributes parity across the drives.
With a RAID system, you don't have to be afraid of your computer system.
