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What is Raid 5?

Updated: 10/3/2023
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14y ago

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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.

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RAID 5 is a redundant array of independent disks configuration that uses disk striping with parity.

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11y ago

A ______ uses block-level striping with parity data distributed across all member disks. It has achieved popularity because of its low cost of redundancy.

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Q: What is Raid 5?
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Related questions

Which is faster raid 1 or raid 5?

raid 5


Which raid level uses striping with parity?

RAID 5


What raid level is disk striping with parity?

Raid 5


What level of RAID will result in two sets of disks that contain the same information?

RAID 1, RAID 1 + 0, and RAID 5, 6.


What additional hardware would be necessary to implement each of RAID 1 and RAID 5?

Essentially that just means understanding what raid one and raid 5 are. Raid one stores the data on 2 hard disks, raid 5 stores the data on 3 to 5 disks. In either of these circumstances all the hard disks must be completely identical right down to brand cache, size etc.


Will raid 5 support different speed hard drive?

For Raid 5 all the hard drives have to be of the same speed.


Who invented RAID 5 technology?

I did...


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.


The drive conigurations supported by windows xp professional provides fault tolerance?

RAID 1, RAID 0+1, RAID 5 and 6.


What raid level provides fault tolerance?

RAID 1 OR RAID 5 provide added performance as well as fault tolerance --- GAURAV TOMAR


What is a 5 letter word for raid?

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What are the ratings and certificates for Vikings - 2013 Raid 1-5?

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