Avago Technologies SAS 9300-4i Host Bus Adapter - Manual (Page 10)

LSI Corporation
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SAS-3 Integrated RAID Solution User Guide
November 2012 Chapter 2: Overview of Integrated RAID Mirrored Volumes
Operation of Mirrored Volumes
The following figure shows the logical view and physical view of an Integrated Mirroring volume. Each logical block
address (LBA) is mirrored on the second disk.
Figure 2 Integrated Mirroring Volume
You can configure an Integrated Mirroring Enhanced volume with up to 10 mirrored disks. The following figure shows
the logical view and physical view of an Integrated Mirroring Enhanced volume with three mirrored disks. The
firmware writes each mirrored stripe to a disk and mirrors it to an adjacent disk. RAID 1E is another term for this type of
mirrored configuration.
Figure 3 Integrated Mirroring Enhanced with Three Disks
3_00007-00
LBA 1
LBA 2
LBA 3
LBA N
LBA 1
LBA 2
LBA 3
LBA N
LBA 1'
LBA 2'
LBA 3'
LBA N’
+
Physical View Logical View
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3K\VLFDO9LHZ /RJLFDO9LHZ
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