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RAID 1 mirroring is illustrated in Figure A- 3.
Logical Drive
Figure A- 3: RAID 1
In addition to the data protection RAID 1 provides, this RAID
level also improves performance.
concurrent I/Os are occurring, these I/Os can be distributed
between disk copies, thus reducing total effective data access
time.
A.3.4 RAID 1(0+1)
RAID 1 (0+1) combines RAID 0 and RAID 1 – mirroring and
disk striping. RAID (0+1) allows multiple drive failure because of
the full redundancy of the hard disk drives. If more than two hard
disk drives are chosen for RAID 1, RAID (0+1) will be performed
automatically.
RAID 1(0 + 1) mirroring and striping is illustrated in Figure A- 4.
Galaxy 16i User's Manual
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Physical Disks
Mirroring
Block 1
Block 2
Block 3
Block 4
.
.
In cases where multiple
Block 1
Block 2
Block 3
Block 4
.
.
A-5
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