CHAPTER 4: Advanced Hardware Setup
In the graphic below, each letter represents a unique block of data, and the number next to each number represents which copy of the data files are stored. The “P” next to a letter represents parity
RAID 5
A1 | A2 | AP |
B1 | BP | B2 |
CP | C1 | C2 |
Understanding RAID 10
RAID 10 (also called RAID 1+0 or RAID 1&0) contains sets of RAID 1 mirrors acting as drives within a RAID 0 striping array. With this setup, the array could survive one drive failure in each mirror array.
In the graphic below, each letter represents a unique block of data, and each column represents a separate hard drive.
| RAID 0 |
RAID 1 | RAID 1 |
A | A | B | B |
C | C | D | D |
E | E | F | F |
Drawback
A RAID 5 array is treated as one drive with the capacity of all but one of the drives added together.
RAID 10 treats the entire array as a single drive with twice the storage capacity of the smallest drive. So if you have four drives (350 GB, 300 GB, 250 GB, and 200 GB) in a RAID 10 array, your computer recognizes a single drive with 400 GB total capacity.
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