5-16 Intel® Server RAID Controller U3-1 User’s Manual Rev 1.0
RAID Features
Figure 5-4. Data Map of a RAID Level 1 Volume, Volume on 2 Disks with Mirroring
5.2.9.4 RAID Level 10 Example
This RAID level is not user selectable. In arrays with more than 2 disks (see Figure 5-5 and
Figure 5-6) a RAID 1 volume stills write each data element twice, but it utilizes all the disks in the
array. Some vendors refer to this as RAID 10 or 0+1, since it is a combination of RAID 0 and 1.
This increases performance by spreading the load across all the disks. In addition to good
performance, this type of array also provides high reliability but its usable capacity is one half of its
physical capacity. In the event one disk fails, data integrity is maintained.
Figure 5-5. Data Map of a RAID Level 10 Volume with 3 Disks, Showing the First 4 Stripes -
Striping with Mirroring with Three Disks
Data Map of a RAID Level 1 Volume
Di is the i'th data strip
Disk #0 Disk #1
Vol 1
Vol 0
D2
D1
D0
D2
D1
D0
Disk #0 Disk #1 Disk #2
Vol 1
Vol 0
Data Map of a RAID Level 10 Volume
Di is the i'th data strip
D4
D3
D1
D0
D5
D3
D2
D0
D5
D4
D2
D1
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