Calculating space for parity in RAID-5

What are the calculations for RAID-5 in regards to the amount of space parity will consume? For instance, if I...

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have a RAID-5 with 10 146 GB drives, what is the percent factor of space used for parity?

I just got asked the same question a few weeks ago. In answer to your specific question, 10[x] 146 GB drives in a RAID-5 configuration would provide 1.316 TB of useable space. The way that I figured this out is using a RAID calculator from ibeast that can be found at: http://www.ibeast.com/content/tools/RaidCalc/RaidCalc.asp

Also, a fellow SearchStorage.com expert, Stephen Foskett answered a similar question and provided a formula for calculating disk space on RAID-5 sets: https://searchstorage.techtarget.com/answers

The space calculation shows that the parity stripe would consume approximately 10% of the overall storage space, or 146 GB of disk space.

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RAID 6 (redundant array of independent disks) RAID 6, also known as double-parity RAID, uses two parity stripes on each disk. It allows for two disk failures within the RAID set before any data is lost.

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

What is the difference between erasure coding, RAID 5 and RAID 6? RAID 5 and RAID 6 are two types of erasure coding. The former protects data with basic parity, while the latter builds in a second layer of parity for even greater protection.

parity Parity is a method of detecting errors in data transmissions between computers, while parity bit and parity checking are used in RAID technology to guard against data loss.

RAID 3 (redundant array of independent disks) RAID 3 is a RAID configuration that uses striping and parity, but it uses a parity disk to store the parity information generated by a RAID controller instead of striping it with the data.

What does the parity bit do in RAID? Find out how the use of a parity bit protects RAID groups and how it's used as a method for error detection.

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