Creating A Raid 0 Group - Huawei OceanStor S5600 Initial Configuration Manual

OceanStor S5600 Storage System
Initial Configuration Guide
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3.2.2 Creating a RAID 0 Group

RAID 0 is suitable for unimportant services that requires high read/write ability, such as
streaming media. RAID 0 can be created conveniently on the OSM3.0.
Procedure
Step 1 On the OSM3.0 main interface, click Service. Then, in the Service navigation tree, expand the
RAID Group node. Click RAID Group Manager.
Step 2 On the right of the RAID Group Manager interface, click Create RAID Group. The Create
RAID Group interface is displayed. See
Issue 02 (2009-09-30)
RAID 6 provides double data check; therefore, RAID 6 is complex and burdened by
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heavy load. The read/write performance is lower than that of RAID 5.
RAID 10 provides high read and write performance. The more mirroring disks it has,
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the higher read performance but lower write performance it provides.
Cost
The disk usage of a RAID 0 group is 100%, which means the lowest cost.
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RAID 1 provides mirroring disks for a working disk, and the disk usage is 1/m, in which
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m stands for the number of mirroring disks. A RAID 1 group has lower disk usage and
higher cost than a RAID 5 group.
NOTE
You can create RAID 0, RAID 5, RAID 6, and RAID 10 directly in the OSM3.0. To create RAID
1, you can set the number of disks in the mirroring group on the interface of creating RAID 10
to be the same as that of member disks.
The disk usage of a RAID 5 group is (n-1)/n, in which n stands for the number of member
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disks. For example, a RAID group consisting of three hard disks has the lowest disk
usage, only 66.7%. The verification data in a RAID 5 group is equivalent of one hard
disk capacity. Therefore, a RAID 5 group has a low storage cost.
The disk usage in RAID 6 is（n-2)/n (n is the number of member disks in the RAID
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group). When the RAID group is composed of four disks, the usage is the lowest only
50%. The amount of the check data in RAID 6 is equal to the capacity of two disks;
therefore, the storage cost of RAID 6 is higher than RAID 0 and RAID 5, and lower
than RAID 1 and RAID 10.
RAID 10 provides mirroring disks for a working disk, and the disk usage is 1/m, in
–
which m stands for the number of mirroring disks. A RAID 10 group has lower disk
usage and higher cost than a RAID 5 group.
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3 Configuring the Storage System
Figure 3-3.
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