To meet the expanded business needs, you can increase the size of a cloud disk when it is used as a system disk or a data disk. To resize the disks, use different features:

  • For a system disk: Change System Disk
  • For a data disk: Resize Disk

Size limits of cloud disks

The size limits of cloud disks for resizing vary between system disks and data disks.

System disks

By using the Change system disk feature, you can keep the system disk size unchanged or increase the size only, but not reduce the size. For example, before changing, the system disk of a CentOS instance is of 35 GiB, so it must be equal to or greater than 35 GiB after changing. The size limit for changing is determined by the image and the current size of the system disk, as displayed in the following table.

Image Size limit (GiB)
Linux (excluding CoreOS) + FreeBSD [Max{20, current size of the system disk}, 500]
CoreOS [Max{30, current size of the system disk}, 500]
Windows [Max{40, current size of the system disk}, 500]

Data disk

By using the Resize Disk feature, you can keep the data disk size unchanged or increase the size only, but not reduce the size. The following table lists the capacity limit of a data disk after resizing, which is determined by the cloud disk types.

Cloud disk type Current capacity Capacity after resizing
Basic Cloud Disk  Any 2,000 GiB
SSD Cloud Disk or Ultra Cloud Disk equal or less than 2,048 GiB 2,048 GiB
SSD Cloud Disk or Ultra Cloud Disk > 2,048 GiB Cannot be resized
ESSD Cloud Disk Any 32,768 GiB

Operations

You can perform the following tasks: