• Elastic Volume Service

evs
  1. Help Center
  2. Elastic Volume Service
  3. User Guide
  4. Management
  5. Expanding the Capacity of an EVS Disk
  6. Introduction to Expansion Scenarios

Introduction to Expansion Scenarios

When the storage space of an EVS disk is insufficient, you can handle the insufficiency in either of the following ways:
  • Create a new disk and attach it to a server.
  • Expand the capacity of an existing disk. Both system disks and data disks can be expanded.
    You can expand the disk capacities when the disks are in the In-use or Available state.
    • Expanding an In-use disk means that the to-be-expanded disk has been attached to a server. Currently, only some server OSs support the expansion of In-use disks. Therefore, ensure that the server OS meets the requirements before you expand an In-use disk. For details, see Expanding an In-use EVS Disk.
    • Expanding an Available disk means that the to-be-expanded disk has not been attached to a server. For details, see Expanding an Available EVS Disk.
When a disk has been put to use, you must check the disk partition style before expanding its capacity. The details are as follows:
  • If the MBR partition style is used, the maximum disk capacity supported is 2 TB (2048 GB), and the disk space exceeding 2 TB cannot be allocated and used.
  • If the GPT partition style is used, the maximum disk capacity supported is 18 EB (19327352832 GB). An EVS data disk supports a maximum of 32 TB (32768 GB), which means that you can expand the capacity of an EVS data disk to up to 32 TB when the GPT partition style is used.

If the in-use disk partition style is MBR and the disk capacity needs to be expanded to over 2 TB, change the disk partition style from MBR to GPT. Ensure that the disk data has been backed up before changing the partition style because services will be interrupted and data on the disk will be cleared during this change.