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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.

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Which RAID version does not provide data redundancy?

RAID 0.


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.


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


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


What provides redundancy through a process called disk mirroring?

RAID level 1


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.


What technology would be best to use for drive redundancy and data protection?

A Raid technology.


What are the two goals when implementing a RAID solution?

Reducing access and read time. Providing redundancy.


What uses two or more drives in combination to create a fault-tolerant system?

RAID (Redundant Array of Independent Disks) uses two or more drives in combination to create a fault-tolerant system. RAID configurations distribute data across multiple drives to improve performance, redundancy, or a combination of both.


What is Raid 5?

A RAID 5 uses block -level striping with parity data distributed across all member disks. RAID 5 has achieved popularity due to its low cost of redundancy. This can be seen by comparing the number of drives needed to achieve a given capacity. RAID 1 or RAID 0+1, which yield redundancy, give only s / 2 storage capacity, where s is the sum of the capacities of n drives used. In RAID 5, the yield is . As an example, four 1TB drives can be made into a 2 TB redundant array under RAID 1 or RAID 1+0, but the same four drives can be used to build a 3 TB array under RAID 5. Although RAID 5 is commonly implemented in a disk controller, some with hardware support for parity calculations (hardware RAID cards) and some using the main system processor (motherboard based RAID controllers), it can also be done at the operating system level, e.g., using Windows Dynamic Disks or with mdam in Linux. A minimum of three disks is required for a complete RAID 5 configuration. In some implementations a degraded RAID 5 disk set can be made (three disk set of which only two are online), while mdadm supports a fully-functional (non-degraded) RAID 5 setup with two disks - which function as a slow RAID-1, but can be expanded with further volumes. In the example on the right, a read request for block A1 would be serviced by disk 0. A simultaneous read request for block B1 would have to wait, but a read request for B2 could be serviced concurrently by disk 1.


Why is RAID 0 of any use if it offers no redundancy?

RAID 0 can be used to improve performance through concurrent access and/or create large logical disks out of multiple physical disks.