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A-10
Adaptec Storage Manager Pro User’s Guide
RAID 5 Set
The
RAID 5 set
is similar to a stripe set, except that it uses parity to
provide redundancy. A RAID 5 set must be made up of at least three
equal-sized partitions on different drives, and the data is striped
evenly across its respective drives in equal-sized chunks. You must
have at least three partitions to permit the system to rebuild the data
if one drive fails.
As data is striped across the partitions, one chunk of each stripe is used
for parity data
. The parity chunks are distributed across all
participating drives of the RAID 5 set, so parity operations are
evenly divided among all the partitions in the array.
Figure A-6 represents a RAID 5 set made up of four partitions, each
on different drives. The free space of the larger drive is not used.
Figure A-6. RAID 5 set
*P = Parity
Partition A1
4 GB
Chunks
1,P*,7,10,13...
Partition A2
4 GB
Chunks
2,4,P*,11,14...
Partition A3
4 GB
Chunks
3,5,8,P*,15...
Free Space
Partition A4
4 GB
Chunks
P*,6,9,12,P*...
RAID 5 Set A
12 GB
Chunks 1,2,3,4,5,6,7,8,
9,10,11,12,13,14,15...
Drive 1
Drive 2
Drive 3
Drive 4
Содержание 2110S - SCSI RAID Controller
Страница 1: ...R Adaptec Storage Manager Pro v1 11 User s Guide...
Страница 6: ......
Страница 52: ...3 9 Managing Arrays For more information about each of the properties tabs refer to the Online Help...
Страница 137: ...B 7 Choosing Your Array Type...