Common Questions Overview

CDS

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      • Instance snapshots
    • Introduction to snapshot
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    • Block Device Persistent Naming
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CDS

  • API Reference
    • Disk Related Interfaces
  • Dedicated Cluster Operation Guide
    • Charge
    • Create a dedicated cluster
    • Create Cloud Disk Server in Dedicated Cluster
    • Expand Dedicated Cluster
    • View Dedicated Cluster Information
    • What Is a Dedicated Cluster
  • Disk Operation Guide
    • Basic Operations
      • Create cloud disks
      • Disk encryption
        • Encrypt Data Disk and Snapshot
        • Encrypt System Disk and Image
        • Encryption Overview
      • Format cloud disks
        • Format Disk Partition on Linux System
        • Format Disk Partition on Windows System
        • Overview
      • Monitor alarm
      • mount Cloud Disk Server
      • Recycle bin
      • Release cloud disks
      • Tag Management
      • Unmount Cloud Disk Server
    • Billing management
      • Renew cloud disks
      • Shift Charge
    • Elastic Operations
      • Burst performance capability
      • Change cloud disk type
      • Performance preconfiguration
        • Use Performance Pre-Configuration
        • What Is Performance Pre-Configuration
      • Resize cloud disks
        • Expansion Overview
        • Extend Disk Partition on Linux Data Disk
        • Extend Disk Partition on Linux System Disk
        • Extend Disk Partition on Windows Data Disk
        • Extend Disk Partition on Windows System Disk
  • FAQs
    • Billing Problems
    • Common Questions Overview
    • Configuration-related questions
    • Fault-related questions
    • Performance-related questions
    • Security Problems
  • Peripheral Tools
    • CDSCMD Tool
      • Configure CDS CMD Tool
      • Install CDS CMD Tool
      • Operate Disk Using CDS CMD Tool
      • Overview
      • Tool Version History
  • Product Description
    • Application scenarios
    • Disk Status
    • Disk types
    • Product advantages
    • Product features
    • Product functions
    • Product Introduction
    • Type and Region
  • Product pricing
    • Disk charge type
      • Pay as you go
      • Subscription billing
    • Disk Expiration and Debt Reminder
    • Snapshot Charge Type
    • Universal Storage Capacity Package GSCP
  • Product Updates
    • Function Release Records
    • Product Announcement
      • Adjustments to prepay Disk renew, shift charge, and Unsubscribe Operations
  • Service Level Agreement (SLA)
    • Baidu Intelligent Cloud Block Storage Trusted Cloud
    • CDS Service Level Agreement (SLA V2_0)
  • Snapshot Operation Guide
    • Disk Snapshot
      • Automatic snapshot
      • Create a custom image
      • Create CDS disk from snapshot
      • Cross-region replication
      • Delete a snapshot
      • Manual Snapshot
      • Snapshot Rollback
      • Tag Management
    • Instance snapshots
      • Instance snapshots
    • Introduction to snapshot
      • Instructions for use
      • Snapshot chain
  • Typical Practices
    • Block Device Persistent Naming
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Table of contents on this page
  • Billing Problems
  • Performance-related questions
  • Configuration-related questions
  • Fault-related questions
  • Security Problems

Common Questions Overview

Updated at：2025-11-03

Billing Problems

  • [Will a CDS cloud disk be charged if it is disconnected from an instance?](CDS/FAQs/Billing Problems.md#Will a CDS cloud disk be charged if it is disconnected from an instance?)
  • [Does a CDS cloud disk have traffic limits?](CDS/FAQs/Billing Problems.md#Does a CDS cloud disk have traffic limits?)
  • [Is there a charge for creating a CDS cloud disk from a snapshot or rolling back a disk from a snapshot?](CDS/FAQs/Billing Problems.md#Is there a charge for creating a CDS cloud disk from a snapshot or rolling back a disk from a snapshot?)
  • [A user has paid the one-time subscription fee for their CDS cloud disk. Why are post-payment bills still being generated?](CDS/FAQs/Billing Problems.md#A user has paid the one-time subscription fee for their CDS cloud disk. Why are post-payment bills still being generated?)
  • [How to release a CDS cloud disk?](CDS/FAQs/Billing Problems.md#How to release a CDS cloud disk?)
  • [Are snapshots generated by a CDS cloud disk charged?](CDS/FAQs/Billing Problems.md#Are snapshots generated by a CDS cloud disk charged?)
  • [When does a billing change take effect?](CDS/FAQs/Billing Problems.md#When does a billing change take effect?)
  • [Are there any time limits for renewing a prepaid CDS cloud disk?](CDS/FAQs/Billing Problems.md#Are there any time limits for renewing a prepaid CDS cloud disk?)

Performance-related questions

  • [What is the maximum size of a single file that can be stored on a CDS cloud disk?](CDS/FAQs/Performance-related questions.md#What is the maximum size of a single file that can be stored on a CDS cloud disk?)
  • [Do CDS cloud disk-related services limit the number of concurrent requests from users?](CDS/FAQs/Performance-related questions.md#Do CDS cloud disk-related services limit the number of concurrent requests from users?)
  • [What types of disks does CDS cloud disk support?](CDS/FAQs/Performance-related questions.md#What types of disks does CDS cloud disk support?)
  • [Between local disks and CDS cloud disks, which performs better in sequential read/write and random read/write?](CDS/FAQs/Performance-related questions.md#Between local disks and CDS cloud disks, which performs better in sequential read/write and random read/write?)
  • [Does a CDS cloud disk support elastic capacity expansion?](CDS/FAQs/Performance-related questions.md#Does a CDS cloud disk support elastic capacity expansion?)
  • [What are the advantages of CDS cloud disks compared to local disks?](CDS/FAQs/Performance-related questions.md#What are the advantages of CDS cloud disks compared to local disks?)
  • [When creating a new CDS cloud disk from a snapshot, can the capacity of the new disk be larger than that of the original disk?](CDS/FAQs/Performance-related questions.md#When creating a new CDS cloud disk from a snapshot, can the capacity of the new disk be larger than that of the original disk?)
  • [What is the maximum capacity supported by a CDS cloud disk?](CDS/FAQs/Performance-related questions.md#What is the maximum capacity supported by a CDS cloud disk?)
  • [Does a local disk support capacity expansion?](CDS/FAQs/Performance-related questions.md#Does a local disk support capacity expansion?)
  • [Does a CDS cloud disk support transfer between accounts?](CDS/FAQs/Performance-related questions.md#Does a CDS cloud disk support transfer between accounts?)

Configuration-related questions

  • [How to resolve the drive letter drift issue of a CDS cloud disk?](CDS/FAQs/Configuration-related questions.md#How to resolve the drive letter drift issue of a CDS cloud disk?)
  • [How to conduct regular and comprehensive checks on the configuration and usage status of a CDS cloud disk?](CDS/FAQs/Configuration-related questions.md#How to conduct regular and comprehensive checks on the configuration and usage status of a CDS cloud disk?)
  • [A new CDS cloud disk has been purchased, but it cannot be seen in the server. What should I do?](CDS/FAQs/Configuration-related questions.md#A new CDS cloud disk has been purchased, but it cannot be seen in the server. What should I do?)
  • [I selected the wrong disk type and want to upgrade the current general-purpose HDD to a high-performance cloud disk. How to operate?](CDS/FAQs/Configuration-related questions.md#I selected the wrong disk type and want to upgrade the current general-purpose HDD to a high-performance cloud disk. How to operate?)
  • [Can data from a general-purpose HDD be migrated to a high-performance cloud disk?](CDS/FAQs/Configuration-related questions.md#Can data from a general-purpose HDD be migrated to a high-performance cloud disk?)
  • [How to migrate data in a CDS cloud disk?](CDS/FAQs/Configuration-related questions.md#How to migrate data in a disk?)
  • [How to expand the capacity of a local disk?](CDS/FAQs/Configuration-related questions.md#How to expand the capacity of a local disk?)
  • [How to properly take a CDS cloud disk offline?](CDS/FAQs/Configuration-related questions.md#How to properly take a CDS cloud disk offline?)
  • [How to mount and use a CDS cloud disk in a Windows system?](CDS/FAQs/Configuration-related questions.md#How to mount and use a CDS cloud disk in a Windows system?)
  • [Can a snapshot exist independently of a CDS cloud disk?](CDS/FAQs/Configuration-related questions.md#Can a snapshot exist independently of a CDS cloud disk?)
  • [Is it necessary to unmount a disk before creating a disk snapshot?](CDS/FAQs/Configuration-related questions.md#Is it necessary to unmount a disk before creating a disk snapshot?)
  • [When a separately purchased CDS cloud disk is mounted to a virtual machine with a Windows operating system, can it have an independent drive letter in the system? Is the usage method of the disk in the Windows system exactly the same as that of a local disk?](CDS/FAQs/Configuration-related questions.md#When a separately purchased CDS cloud disk is mounted to a virtual machine with a Windows operating system, can it have an independent drive letter in the system? Is the usage method of the disk in the Windows system exactly the same as that of a local disk?)
  • [Can a CDS cloud disk already mounted to a virtual machine be unmounted and then mounted to another virtual machine? Can it be unmounted again later and mounted back to the original virtual machine? Can data be imported from one virtual machine to another through the “unmount and remount” method?](CDS/FAQs/Configuration-related questions.md#Can a CDS cloud disk already mounted to a virtual machine be unmounted and then mounted to another virtual machine? Can it be unmounted again later and mounted back to the original virtual machine? Can data be imported from one virtual machine to another through the “unmount and remount” method?)
  • [Can a CDS cloud disk be mounted shared among multiple BCC cloud servers?](CDS/FAQs/Configuration-related questions.md#Can a CDS cloud disk be mounted shared among multiple BCC cloud servers?)
  • [In a Linux server, how to install a website on a data disk?](CDS/FAQs/Configuration-related questions.md#In a Linux server, how to install a website on a data disk?)

Fault-related questions

  • [What impact will unmounting a CDS cloud disk from a cloud server have on the data?](CDS/FAQs/Fault-related questions.md#What impact will un`mounting a CDS cloud disk from a cloud server have on the data?)
  • [What impact will deleting a cloud server instance have on the mounted CDS disks?](CDS/FAQs/Fault-related questions.md#What impact will deleting a cloud server instance have on the data in the mounted CDS disks?)

Security Problems

  • [Is it safe to store data with CDS cloud disks?](CDS/FAQs/Security Problems.md#Is it safe to store data with CDS cloud disks?)
  • [If a separately purchased disk is mounted to a server: Will the disk be deleted if the disk expires first while the server remains active? What is the retention period?](CDS/FAQs/Security Problems.md#If a separately purchased disk is mounted to a server: Will the disk be deleted if the disk expires first while the server remains active? What is the retention period?)

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Configuration-related questions