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SAS2 Integrated RAID Solution User Guide Chapter 2: Overview of Integrated RAID Mirrored Volumes | Operation of Mirrored Volumes
LSI Corporation Confidential
| August 2010 Page 9
Figure 1: Typical Integrated Mirroring Implementation
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.
Primary Mirror
Integrated Mirroring Volume
SAS
LSI
Fusion-MPT
SAS2 Controller
Memory Bus
NVSRAM
(For Write Journaling)
FLASH
(For Configuration)
3_00006-00
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 ViewLogical View