From the course: Complete Guide to Linux Security: Protecting Your Linux Server Environment
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RAID 5 - Linux Tutorial
From the course: Complete Guide to Linux Security: Protecting Your Linux Server Environment
RAID 5
- Now let's get into RAID 5, which is known as striping with parity. If you look at the slide here, we see three disks, and you can see that we have data and we have something known as parity. So when you're using RAID 5, what happens is the data is striped across the disks. In addition, parity information, which is compressed versions of the data, which could be used to rescue the data, is also striped across the disks. So for example, when we write our first chunk of data, and we can call that A, a piece of it will be written to disk one, another piece will be written to disk two, and then the corresponding parity information for that data will be written to disk three, and we're showing that here as A with a P in superscript. Then the next set of data, or the next chunk of data, B we'll call it, the first piece of that will be written to disk one, the second piece to disk three, and then the parity information, which can reconstruct that data is in disk two. Finally, continuing…
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