NOTE
If you plan to create a RAID 10 storage pool in the disk domain that you are creating, you are advised to
manually select an even number of disks owned by each engine for each storage tier in the disk domain to
ensure the reliability of RAID 10.
The storage system provides hot spare space by configuring hot space policies, so that the hot spare space can
take over data from failed member disks.
You are advised to configure a maximum of 100 disks for each tier in a disk domain. For example, if the
number of disks on a tier is D (divide D by 100 and then round off the result to N and the remainder is M),
you can refer to the following configurations:
l
If D ≤ 100, configure all disks on this tier in one disk domain.
l
If D > 100, create N+1 disk domains and evenly distribute all disks to the N+1 disk domains. That is,
the number of disks in each disk domain is D/(N+1).
l
For SmartTier, it is recommended that a maximum of 100 disks be configured for each tier in a disk
domain. The configuration of disks on each tier is the same as the preceding principle.
Example 1: The total number of SSDs in the storage system is 328, which is the value of D. (Divide 328 by
100. Round off the result to 3, which is the value of N. The remainder is 28, which is the value of M). You are
advised to configure four disk domains, each of which contains 328/4 = 82 SSDs.
Example 2: If the total number of SSDs in the storage system is 223, which is the value of D. (Divide 223 by
100. Round off the result to 2, which is the value of N. The remainder is 23, which is the value of M). You are
advised to configure three disk domains, each of which contains 223/3 = 74.3 disks. In this case, two disk
domains are configured with 74 disks respectively and the other disk domain is configured with 75 disks.
Example 3: If a disk domain consists of SSDs, SAS disks, and NL-SAS disks, for SmartTier, the number of
disks of each type cannot exceed 100.
If the project requires a disk domain containing over 100 disks to meet capacity and service planning
requirements, contact Huawei technical engineers to evaluate.
Step 7
Click
OK
.
A message is displayed, indicating that the operation succeeded.
Step 8
Click
OK
. The disk domain has been created. To view basic information about disks in the
current disk domain, click the
Disk
tab in the information display area below. To view the
engine to which a disk belongs, click
.
----End
4.5.2 Creating a Storage Pool
Create storage pools for application servers to use the storage space provided by a storage
system.
Prerequisites
A disk domain is created.
Context
l
You are advised to use different disk domains to create storage pools for the block
storage service and file storage service.
l
For 2000, 5000, 6000, 18000 series storage systems, a storage pool is a logical
combination of one or multiple storage tiers in a disk domain. Different storage tiers may
have different RAID policies.
l
A RAID policy includes a RAID level and the number of disk blocks and parity blocks
and parity blocks of this RAID level.
OceanStor V3 Series
HyperMetro Feature Guide for File
4 Configuration
Issue 05 (2018-01-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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