Avago Technologies SAS 9300-4i Host Bus Adapter - Manual (Page 24)

LSI Corporation
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SAS-3 Integrated RAID Solution User Guide
November 2012 Chapter 4: Overview of Integrated Striping
Integrated Striping Description
4.3 Integrated Striping Description
On Integrated Striping volumes, the firmware writes data across multiple disks instead of onto one disk by
partitioning each disk’s storage space into 64-KB stripes. The firmware interleaves the stripes in such a way that the
combined storage space consists alternately of stripes from each disk.
The following figure shows an example of Integrated Striping. In this example, the firmware writes segment 1 to disk 1,
segment 2 to disk 2, segment 3 to disk 3, and so on. When the firmware reaches the end of the disk list, it continues
writing data at the next available segment of disk 1.
Figure 8 Integrated Striping Example
The following figure shows a logical view and a physical view of an Integrated Striping volume with three disks.
Figure 9 Integrated Striping – Logical and Physical Views
Speed is the primary advantage of the Integrated Striping solution because it transfers data to or from multiple disks
simultaneously. However, Integrated Striping volumes have no data redundancy. Back up the data on other media to
avoid losing unsaved data if one disk fails.
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