Help Center/ Huawei Cloud Flexus_Huawei Cloud Flexus L Instance/ User Guide/ Managing EVS Disks/ Overview
Updated on 2024-09-27 GMT+08:00
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Overview

Elastic Volume Service (EVS) provides scalable block storage that features high reliability, high performance, and a variety of specifications for cloud servers. An EVS disk can be used as a system disk or a data disk. For details about EVS disks, see Disk Types and Performance.

System Disks of FlexusL Instances

  • System disks of FlexusL instances are General Purpose SSD EVS disks.
  • Each FlexusL instance has one system disk with a fixed capacity. System disks of FlexusL instances cannot be expanded separately. You can expand the system disk capacity by upgrading the instance specifications. For details, see Upgrading a FlexusL Instance.
  • System disks can only be purchased, renewed, and unsubscribed from along with the FlexusL instances they are attached to. They cannot be detached from instances.

Data Disks of FlexusL Instances

  • Data disks of FlexusL instances are General Purpose SSD V2 EVS disks.
  • Each FlexusL instance can have only one data disk. The disk size range is from 10 to 2048, in GiB. You can purchase a data disk when purchasing a FlexusL instance, or you can purchase one on the FlexusL console afterwards.
    • After a data disk is purchased, it is automatically attached to the FlexusL instance without manual intervention.

      A newly purchased data disk must be manually initialized before you can use it. For how to initialize a data disk, see Initializing a Data Disk.

    • Data disks (billed on a yearly/monthly basis) can only be renewed and unsubscribed from together with the FlexusL instances they are attached to. They cannot be detached from FlexusL instances.
  • Data disks used by FlexusL instances only can be purchased on the FlexusL console. Existing EVS disks (including EVS disks attached to other servers) on the EVS console cannot be attached to FlexusL instances.

Notes and Constraints

  • System disks of FlexusL instances cannot be expanded, attached, or detached, separately.
  • Data disks of FlexusL instances can only be added or expanded on the FlexusL console, but cannot be detached. Existing EVS data disks cannot be attached to FlexusL instances.
  • System and data disks of FlexusL instances cannot be renewed or unsubscribed from, separately.
Parent Topic: Managing EVS Disks