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How does parity work on a RAID-5 array?

Freshabout 2 months ago
Mar 15, 202656027 views
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Problem

I'm looking to build a nice little RAID array for dedicated backups. I'd like to have about 2-4TB of space available, as I have this nasty little habit of digitizing everything. Thus, I need a lot of storage and a lot of redundancy in case of drive failure. I'll also essentially be backing up 2-3 cā€¦

Error Output

/---STORAGE---\    /---PARITY----\
|   DRIVE_1   |    |   DRIVE_4   |
|   DRIVE_2   |----|     ...     |
|   DRIVE_3   |    |             |
\--------ā€¦

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Fix for: How does parity work on a RAID-5 array?

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It just XORs each corresponding bit from each drive - If you lose any drive, you can re-build the missing data. For background: Assume that D is the XOR of the other columns, then as long as you only lose one drive, you can figure out what you lost.ā€¦

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