Creating a Disk Pool

Prerequisites

HDD 4KN disks cannot be added to the same disk pool as other types of disks.

Procedure

1. Choose Resources > Resources > Storage Pool.
2. Click the name of the desired storage pool. On the page that is displayed, click the Disk Pool tab.
3. Click Create.

   The Create Disk Pool page is displayed.

4. Set basic parameters for the disk pool.
   Table 1 describes related parameters.

   Table 1 Disk pool parameters

   Parameter	Description
   Disk Pool Name	Indicates the name of a disk pool. NOTE: The name must be unique. The name can contain only letters, digits, underscores (_), and hyphens (-). The name contains 1 to 64 characters.
   Main Storage	Indicates the main storage type of a disk pool. When Storage Pool Type is set to Common, possible options are SAS, Self-encrypting SAS, SATA, Self-encrypting SATA, SSD, and SSD card or NVMe SSD. In this case, self-encrypting drives function as common disks and do not use the encryption function. When Storage Pool Type is set to Self-encrypting SAS or Self-encrypting SATA. Each node must be configured with at least four disks of the same type. NOTE: Meanings of the values are: SAS: SAS HDDs SATA: SATA HDDs SSD card or NVMe SSD: NVMe SSDs SSD: SAS SSDs
   Cache	Indicates the cache type of a disk pool. Possible options are SSD card or NVMe SSD and SSD. NOTE: This parameter is not required when Main Storage is set to SSD or SSD card or NVMe SSD.
   Max. Main Storage Media per Node	Indicates the maximum number of storage disks that can be used by a single node to store user data. The value of this parameter determines the allocation of cache and compute resources on the node. Set this parameter based on site requirements. To ensure that cache resources can be allocated to newly added main storage disks in the case of capacity expansion, you are advised to set this parameter based on the total number of main storage disks after capacity expansion. If the value is too small, newly-added main storage disks cannot be allocated with cache resources. Cache resources can be allocated to newly-added main storage disks only after both main storage disks and cache disks are added. If the value is too large, extra cache resources are reserved. As a result, cache resources cannot be fully utilized to improve read/write performance. If you select Default, the system automatically determines the value based on the number of selected main storage disks. Assume that the number of selected main storage disks is N: If N ≤ 12, a single node supports a maximum of 12 main storage disks. If 12 < N ≤ 24, a single node supports a maximum of 24 main storage disks. If N = 25, a single node supports a maximum of 25 main storage disks. If 25 < N ≤ 36, a single node supports a maximum of 36 main storage disks. If 36 < N ≤ 60, a single node supports a maximum of 60 main storage disks. If you select Custom, set the value based on site requirements. The value ranges from 4 to 60.
   Tier Grade	Indicates the tier grade of the disk pool, which is defined based on the type of main storage disks in the disk pool. Possible values are Hot, Warm, Cold, and Self-adaptive. You can choose Resources > Tuning > SmartTier and set tiering policies to store different files to disk pools of different tier grades. NOTE: If you select Self-adaptive: When Main Storage is set to SSD or SSD card or NVMe SSD, Self-adaptive equals to tier grade Hot. When Main Storage is set to SAS, Self-adaptive equals to tier grade Warm. When Main Storage is set to SATA, Self-adaptive equals to tier grade Cold. If you select a tier grade, you are advised to configure the storage tiers based on the self-adaptive rules.

5. In the Choose Node and Disk area, select the nodes and disks that are used to create the disk pool.
   

   • You can click Add and select nodes and disks in the cluster to add them to the disk pool on the Choose Node and Disk page that is displayed.
   • You can select one or more added nodes or disks and click Remove to remove them.

6. Click OK.
7. Confirm your operation as prompted.