
CHAPTER 3: Setting Up and Getting Started
RAID 5 stripes both data and parity information across multiple drives. Striping across drives improves overall performance, and the parity information provides data protection. Because of the
RAID 5
A1 | A2 | AP |
B1 | BP | B2 |
CP | C1 | C2 |
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.
| 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 the storage capacity of the smallest drive × 2. 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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