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Darsh
Created Jan 14, 2019 07:41:57
og in to DeviceManager.
Choose Provisioning > Disk Domain.
Click Create.
The Create Disk Domain dialog box is displayed.
click to enlarge
Name and describe the disk domain.
Specify Name.
NOTE:
The name must be unique.
The name can contain only letters, digits, periods (.), underscores (_), and hyphens (-).
The name must contain 1 to 31 characters.
Specify Description.
Descriptive information, such as the function and properties of the disk domain, helps identify the disk domain.
In Encryption Type, select a type to determine whether the disk domain is created by using self-encrypting disks.
Encryption types include:
Non-Encrypting Disk: creates an unencrypted disk domain.
Self-Encrypting Disk: creates an encrypted disk domain.
NOTE:
Non-Encrypting Disk: Non-encrypting disks are common disks that do not support the encryption function.
Self-Encrypting Disk: When data is written into or read from a self-encrypting disk, the data is encrypted or decrypted using the hardware circuit and internal encryption key of the disk. Before using self-encrypting disks, configure the key service by following instructions in the Disk Encryption User Guide specific to your product model and version.
Self-encrypting and non-encrypting disks cannot co-exist in the same disk domain.
Select the disks that comprise the disk domain. There are three ways to select disks:
NOTE:
GUIs may vary with product versions and models. The actual GUIs prevail.
Select All available disks.
Configure the hot spare policy for each storage tier.
NOTE:
You are not advised to select All available disks. You are advised to select Manually select to ensure that all disks in a disk domain are from the same controller enclosure, reducing the disk failure probability and improving the read and write performance of disks.
Select Specify disk type or Specify the number of disks.
NOTE:
For some models, you can only configure Specify disk type or Specify the number of disks.
Select Specify disk type.
Select the storage tier according to the storage media of disks.
Configure the number of disks for each storage tier.
Configure the hot spare policy for each storage tier.
Select Specify the number of disks.
Specify the number of disks composing the storage tier.
Select Manually select.
Click Select.
In the Select Disk dialog box, select the disks you need and click .
Click OK.
Configure the hot spare policy for each storage tier.
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 controller enclosure for each storage tier in the disk domain to ensure the reliability of RAID 10.
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:
If D ≤ 100, configure all disks on this tier in one disk domain.
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). In addition, it is recommended that disk enclosures be fully configured.
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 also follows the preceding principle.
Example 1: The total number of SSDs in a 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: The total number of SSDs in a 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 a project requires a disk domain containing over 100 disks to meet capacity and service planning requirements, contact Huawei technical support engineers for evaluation.
Click OK.
A message is displayed, indicating that the operation succeeded.
Click OK.
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