Change Disk Media Type

Last updated: 2019-10-09 19:48:12

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Scenario

Tencent Cloud CVM supports the adjustment of storage hardware media, which enables you to flexibly respond to different storage needs of different services.
Tencent Cloud provides two types of block storage, i.e., Cloud Block Storage and Local Storage. We currently support the change of local disks to cloud disks. This document describes how to change disk media type.
The downside of CVMs with local disks:

  • The configuration cannot be customized due to the limit of host resources.
  • Features such as snapshots and creation acceleration are not supported.
  • Low data reliability.
  • Host failures will have a longer impact.

To avoid the downside of CVMs with local disks, you can change the existing CVMs with local disks in your account to CVMs with cloud disks.

Prerequisites

  • CVM Status
    This operation can only be done when a CVM is in the Shut down state. Please shut down your CVM first.
  • CVM Type
    • Spot CVMs do not support the change of local disks to cloud disks.
    • Dedicated CVMs do not support the change of local disks to cloud disks.
    • CVMs such as big data model D1 and D2 and high I/O model I3 and I4 do not support the change of local disks to cloud disks.
    • Bare metal instances do not support the change of local disks to cloud disks.
  • CVM Configuration
    • You can change local disks to cloud disks only when there is at least one regular local disk or SSD local disk among the system disk and data disks of the CVM.
    • You can change local disks to cloud disks only when cloud disks are available in the availability zone of the CVM and the size of the local disks is within the range supported by cloud disks.
    • If both the system disk and the data disks of the CVM are local disks, when you change the disk media type, it will apply to all of the local disks of the CVM. You will also be able to configure the cloud disk type for each disk separately.
      That means when you change the disk media type for a CVM whose disks are all local disks, you cannot change only the system disk or only the data disks to cloud disks. If you make the change, it will apply to all the disks.
    • Changing the media type of a disk will not change its size. After you change the media type, you may expand cloud disks.
    • Changing local disks to cloud disks will not change the life cycle of a CVM, instance ID, internal/external network IP, disk name, and mount point.

Notes

  • When you change local disks to cloud disks, the data on the local disks will be copied to the cloud disks. How long it takes depends on the amount of data and the data transmission speed. The process may take a while.
  • You can only change local disks to cloud disks, not the other way around.
  • It is recommended to start and log in to the CVM to check if there is any data loss after the change is completed.

Directions

  1. Log in to the CVM Console and go to the list of CVM instances.

    If the CVM has already been shut down, go to Step 3.

  2. To the right of the CVM you want to make change to, click More > Instance Status > Shutdown to shut down the CVM.
  3. To the right of the CVM you want to make change to, click More > Resource Adjustment > Change Disk Media Type.
  4. In the pop-up window, select the cloud disk type you want to use for the system disk and the data disks, check the consent box, and click Convert Now.
  5. Double-check the information, make a payment if applicable, and wait for the process to complete.