Product functions
Updated at：2025-11-03
Overview of supported features for cloud disks
Cloud disks currently offer a comprehensive range of features categorized under billing management, disk management, and snapshot management. Detailed operational guidance can be found in the following overview.
| Category | Function name | Function description | Supported disk types |
|---|---|---|---|
| Billing management | Renew cloud disks | After the expiration of a CDS instance with the “Subscription” payment method, its service will be automatically suspended. Within seven days after expiration, it will be automatically disabled and retain the data while sending renewal notices to users. After renewal, the system will automatically resume the original service. If the expiration exceeds seven days, the CDS data resources will be cleared and cannot be recovered. Users need to repurchase the service. | All |
| Shift charge | Billing method switching: Supports switching between prepaid and postpaid modes. Converting from prepaid to postpaid offers two options: switching after expiration or switching immediately. | All | |
| Disk management | Create cloud disk server (CDS) | You can create a CDS cloud disk while creating a BCC cloud server instance, create a CDS cloud disk for an existing BCC instance, or create a CDS cloud disk independently and then mount it to a specified BCC instance. | All |
| Mount cloud disk server (CDS) | You can mount the created CDS cloud disk to a BCC cloud server instance. | All | |
| Format cloud disks | A newly created CDS cloud disk is in an offline state by default. You need to format it, including partitioning the disk and creating a file system. Formatting is supported on both Linux and Windows systems. | All | |
| Disk encryption | You can encrypt a cloud disk when creating a BCC cloud server instance or a CDS cloud disk. Encryption for custom images and system disks is also supported. Snapshots created from an encrypted cloud disk will be automatically encrypted. | All | |
| Unmount cloud disks | You can unmount a mounted disk. | All | |
| Resize cloud disks | You can resize a disk online based on its original capacity. After resizing, you can adjust the disk’s partitions and file system on Windows or Linux. On Linux, two adjustment methods are supported: master boot record (MBR) partitioning and GUID partition table (GPT) partitioning. | All | |
| Change cloud disk type | You can change the type of a created CDS cloud disk online according to your business needs. CDS supports online type changes for both prepaid and postpaid cloud disks, and is compatible with both system disks and data disks. | All | |
| Release cloud disks | If you no longer need a CDS cloud disk, you can release it. | All | |
| Burst performance capability | Baidu AI Cloud CDS is the first in China to launch burst performance capability. Customers can temporarily use performance exceeding the cloud disk’s limit for a period of time. For example, a disk purchased with 200 IOPS can burst up to 1,300 IOPS for a certain period. | All | |
| Monitor alarm | You can view the disk’s performance monitoring data on the disk details page. | All | |
| Tag management | CDS cloud disks support managing snapshots via tags. | All | |
| Bucket trash | Actively released CDS cloud disks will be retained in the bucket trash for 7 days. | All | |
| Snapshot management | Manual disk snapshots | You can manually create snapshots for purchased CDS cloud disks. | All |
| Automatic disk snapshots | You can create automatic snapshots for CDS cloud disks. You only need to predefine the disks for snapshot creation and the time cycle; the system will automatically create snapshots for you. | All | |
| Automatic snapshot policy | You can create an automatic snapshot policy and associate it with a cloud disk. After association, the disk will initiate automatic snapshot operations according to the policy. A single disk can be bound to multiple snapshot policies to create more complex backup plans. | All | |
| Instance snapshots | Support for synchronously creating snapshots for all cloud disks in a cloud server to back up the entire server’s data. | All | |
| Delete disk snapshots | CDS cloud disks currently provide 512 free snapshot quotas. When the quota is full, you need to delete old snapshots. | All | |
| Create cloud disks from snapshots | You can choose to create a CDS cloud disk from a snapshot. If you have already created multiple snapshots, you can directly create a CDS disk from a snapshot. This operation is often used for data recovery and backup. | All | |
| Rollback disks | When you need to roll back to a previous version or restore data to a past point in time, you can use the snapshot rollback function. | All | |
| Create custom image | You can create custom images for system disks. | Applicable only to system disks | |
| Cross-region replication | You can replicate snapshots from the current region to other regions to enable data sharing across regions. | All | |
| Snapshot chain | A snapshot chain is a collection of all snapshot data generated by a single CDS cloud disk. Each CDS cloud disk has exactly one snapshot chain, which contains all manual and automatic snapshot data created for that disk. Each snapshot chain has a unique snapshot chain ID, which corresponds one-to-one with the disk ID. | All | |
| Snapshot encryption | You can encrypt a cloud disk when creating a BCC cloud server instance or a CDS cloud disk. Snapshots created from an encrypted cloud disk will be automatically encrypted. | Applicable only to data disk snapshots | |
| Tag management | Baidu AI Cloud provides Tag Management function, enabling quick categorization and identification management of cloud resources by adding tags to each resource. | Applicable only to data disk |