System and Data Disks

Last updated: 2020-06-11 15:26:04

    What is the default capacity of a CVM system disk?

    The system disk of a new CVM has 50 GB free space by default.

    Can I change the local system disk of a CVM to a cloud disk?

    • When purchasing a CVM instance,
      you can select the desired disk type for the CVM system disk.
    • For a purchased CVM instance,
      if the availability zone where the purchased CVM is located has available cloud disks, you can use the change disk media type feature to change the local system disk to a cloud disk.

    Which regions and availability zones support expanding the system disk capacity to more than 50 GB?

    If the system disk is a cloud disk, the system disk capacity can be adjusted to more than 50 GB in all regions that support snapshots.

    Can I expand the system disk capacity of a CVM when reinstalling the operating system?

    It depends on the system disk type.
    If the system disk is a cloud disk,
    the system disk capacity can be increased but cannot be decreased.
    If the system disk is a local disk,
    it depends on the system disk size.

    • If the default system disk capacity of the purchased instance is 50 GB, the system disk cannot be expanded.
    • For instances purchased at an earlier time: if the system disk capacity is 20 GB or less, the system disk can be expanded to 20 GB by default. If the system disk capacity is more than 20 GB, the system disk can be expanded to 50 GB by default.

    Can I increase the system disk capacity and then reinstall the operating system to decrease the system disk capacity?

    The capacity of a system disk cannot be decreased.

    How do I save the data on the CVM instance and then expand the system disk capacity?

    To expand the system disk capacity, you can create an image and then use the image to reinstall the operating system.

    What is the system disk capacity if I use an image of less than 50 GB to create or reinstall the CVM?

    The image capacity does not affect the system disk capacity. The minimum system disk capacity is 50 GB.

    Was this page helpful?

    Was this page helpful?

    • Not at all
    • Not very helpful
    • Somewhat helpful
    • Very helpful
    • Extremely helpful
    Send Feedback
    Help