SAS2 Integrated RAID Solution User Guide | Chapter 2: Overview of Integrated RAID Mirrored Volumes Operation of Mirrored Volumes |
Integrated Mirroring Volume
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NVSRAM
(For Write Journaling)
FLASH
(For Configuration)
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.
Logical View |
| Physical View |
LBA 1 | LBA 1 | LBA 1' |
LBA 2 | LBA 2 | LBA 2' |
LBA 3 | LBA 3 | + |
LBA 3' | ||
LBA N | LBA N | LBA N’ |
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.
LSI Corporation Confidential August 2010 | Page 9 |
