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Answer Explanation: RAID 1 uses a minimum of two hard disks to mirror data for fault tolerance. Each hard disk contains a complete copy of the data. Disk duplexing improves mirroring because each disk is on a separate controller. If one disk or controller fails in a duplexing RAID 1 array, the other disk can take over immediately to provide fault tolerance.
RAID 5, also known as disk stripping with parity, provides fault tolerance by striping the data across a minimum of three and a maximum of 32 disks, and by storing parity information on each disk. This allows the RAID array to recover from a single disk failure.
RAID 0, also known as disk striping, is used to increase performance by striping data over a minimum of two and a maximum of 32 disks. RAID 0 provides no fault tolerance.
RAID 3, also known as disk stripping with a parity disk, provides fault tolerance by writing data across three or more drives. Because the least number of hard disks is required, RAID 1 will be used instead of RAID 3.
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What provides redundancy through a process called disk mirroring?
RAID level 1
What technology would be best to use for drive redundancy and data protection?
A Raid technology.
What additional hardware will be necessary to implement two identical hard drive?
Hardware will be RAID PCIe / PCIx RAID hardware controller but The hardware RAID is often the motherboard RAID controller or a separate RAID card.
What is a RAID controller and what bennefits would you receive?
RAID stands for "Redundant Array of Inexpensive/Independent Disks". RAID works by combining two or more hard drives. It can increase performance and/or data redundancy and/or capacity. There are many different RAID types, the most common being RAID 0 (stripe), RAID 1 (mirror) and RAID 5 (stripe with parity).In a RAID 0 (stripe) array, data is split equally between the number of disks in the array. For example, when a 2 MB file is written to a RAID 0 array with two hard drives, the file is split in to two parts and 1 MB of data is written to each hard drive. This increases capacity and performance, but sharply decreases redundancy since only one of the drives needs to fail for all information to be lost.Performance = Drive Speed * Number of DrivesCapacity = Drive Size * Number of DrivesRedundancy allows for no drives to fail.In a RAID 1 (mirror) array, a complete copy is written to each hard drive in the array. Capacity and performance stay the same, but redundancy is increased. As long as one drive works, you will not lose data.Performance = Drive SpeedCapacity = Drive SizeRedundancy allows for all but one drive to fail.In a RAID 5 (stripe with parity) array, you need at least three hard drives. Files are split up to all but one of the drives (similar to RAID 0) and a parity bit is written to the last drive. This increases performance, capacity and redundancy. Performance is not as good as RAID 0, but still better than RAID 1. Redundancy is not as good as RAID 1, but is still quite reliable.Performance = Drive Speed * (Number of Drives - 1) (Theoretical)Capacity = Drive Size * (Number of Drives - 1)Redundancy allows for one drive to fail.There are other RAID levels, but they are not as common.The main benefit of using a RAID array is data redundancy and/or performance.Non-commercial (home) users and enthusiasts wanting a very large increase in performance (theoretically multiples of the number of drives used) usually go for RAID 0 since they often are not too worried about drive failure and they enjoy the larger drive capacities that it provides.Small businesses who only need cheap redundancy usually go for RAID 1. If one drive fails, the drive can be replaced and the mirror array restored.Larger businesses or those needing file/database performance go for RAID 5. They can afford the price of an extra drive and a more expensive RAID controller. RAID 5 provides high performance with large capacities while still maintaining data redundancy and is the most desirable in a business or enterprise environment.There are some other options for RAID such as RAID 10 or RAID 01.RAID 10 features two separate RAID 0 arrays which are then mirrored in a RAID 1 array.RAID 01 is the opposite, with two separate RAID 1 arrays which are then striped with a RAID 0 array.There are other non-standard RAID levels, but most are rather uncommon.Alternatively, there is also drive spanning (aka JBOD), but this provides no extra redundancy or performance. Drives are "glued", if you will, end to end.The benefits of each RAID level vary. The type of RAID used depend on the job it must fulfill.
What is raid support?
RAID stands for "Redundant Array of Inexpensive/Independent Disks". RAID can increase performance and/or data redundancy and/or capacity. There are many different RAID types, the most common being RAID 0 (stripe), RAID 1 (mirror) and RAID 5 (stripe with parity).RAID works by combining two or more hard disks.In a RAID 0 (stripe) array, data is split equally between the number of disks in the array. For example, when a 2 MB file is written to a RAID 0 array with two hard drives, the file is split in to two parts and 1 MB of data is written to each hard drive. This increases capacity and performance, but sharply decreases redundancy since only one of the drives needs to fail for all information to be lost.In a RAID 1 (mirror) array, a complete copy is written to each hard drive in the array. Capacity and performance stay the same, but redundancy is increased. As long as one drive works, you will not lose data.In a RAID 5 (stripe with parity) array, you need at least three hard drives. Files are split up to all but one of the drives (similar to RAID 0) and a parity bit is written to the last drive. This increases performance, capacity and redundancy. Performance is not as good as RAID 0, but still better than RAID 1. Redundancy is not as good as RAID 1, but is still quite reliable. Capacity is the sum of all but one of the drives.There are other RAID levels, but they are not as common.RAID support simply means that whatever device is being described supports RAID. Nearly anything supports RAID. The only computer component that "RAID support" would be relevant to would be a computer motherboard or an IDE or SATA controller.
To provide redundancy you want to implement raid by mirroring the data and use the least number of hard disks which raid level will you implement?
RAID 1
Which RAID version does not provide data redundancy?
RAID 0.
What provides redundancy through a process called disk mirroring?
RAID level 1
How is redundancy achieved in a RAID system?
It depends on what RAID level you are planning to use. One of the most common levels is RAID 1, data is written identically to multiple hard drives. This achieves redundancy in a RAID system. It creates a duplicate, a fail safe in case of a hard drive failure.
Which RAID level morrors one hard drive with a second drive spo that the same data is written to both drives?
Such level of redundancy is called RAID 1 and nowadays is used mostly in consumer level computers.
What is raid level?
A ______ uses block-level striping with parity data distributed across all member disks. It has achieved popularity because of its low cost of redundancy.
Which RAID level stripes data across multiple drives to improve performance?
Every RAID level stripes data across multiple drives, which improves performance compared to using a single disk. RAID 0, RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have better performance than a single disk. Other than RAID 0, all other RAID levels provide fault tolerance. RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have fault tolerance.
What raid level provides fault tolerance?
RAID 1 OR RAID 5 provide added performance as well as fault tolerance --- GAURAV TOMAR
What hardware is needed to implement hardware RAID for fault tolerance?
raid card
What is the purpose of the raid adapters?
to connect multiple storage devices for redundancy or speed
Which type of adapter will need to be installed on the servers to accomplish the desired redundancy?
Raid adapter
When and how do you install raid?
If we need to install Windows Server 2008 R2 OS it does not requires any drivers. RAID is used for redundancy and Higher performance.
