l The RAID level is classified into typical configuration and flexible configuration based
on the number of data blocks and parity blocks. The detailed configuration is shown in
Table 4-9.
Table 4-9 RAID level configuration
RAID Level Typical Configuration Flexible Configuration
RAID 0 - -
RAID 1
l 2D
a
l 4D
-
RAID 10 - -
RAID 3
l 2D+1P
b
l 4D+1P
l 8D+1P
2D+1P to 13D+1P
RAID 5
l 2D+1P
l 4D+1P
l 8D+1P
2D+1P to 13D+1P
RAID 50
l (2D+1P)x2
l (4D+1P)x2
l (8D+1P)x2
-
RAID 6
l 2D+2P
l 4D+2P
l 8D+2P
l 16D+2P
2D+2P to 26D+2P
a: D indicates the data block.
b: P indicates the parity block.
NOTE
For 2000, 5000, 6000, 18000 series storage systems, if the RAID level of one storage tier is
configured with flexible configuration first, this tier is the primary control tier that controls other
tiers' RAID policies. The number of RAID data disks of the primary control tier and the number of
RAID data disks of other tiers must be a multiple of 1, 2, 4, or 8. For example, if the performance
tier is the primary control tier and its RAID policy is 3D+1P, the RAID policy of other tiers must
be 3D+1P, 6D+2P, or so on, and cannot be 4D+1P. If you want to change the current primary
control tier, deselect this tier and select it again.
l For 2000, 5000, 6000, 18000 series storage systems, the following describes the storage
tiers in a storage pool:
– The high performance tier, providing the highest performance, consists of SSDs. As
SSD storage media have a high cost and low capacity, this tier is applicable to the
applications such as database indexes that require a high random read/write
performance.
OceanStor V3 Series
HyperMetro Feature Guide for File
4 Configuration
Issue 05 (2018-01-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
86
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