# Why Does Index Backup Fail?

Index backup is implemented by creating cluster snapshots. If index backup fails, perform the following steps:

#### Check Whether the Account or IAM User Has the Index Backup Permissions

1. Log in to the IAM management console.
2. Check the user group that the account or the IAM user belongs to.

   For details, see Viewing or Modifying User Information.

3. Check whether the permissions assigned to the user group include the following two permissions: Tenant Administrator for project OBS in region Global service and CSS Administrator for the current region.

   For details, see Viewing and Modifying User Group Information.

   - If neither of the preceding permissions has been assigned, go to 4.
   - If both the preceding permissions have been assigned to the group, contact technical support.
4. Add the following permissions to the user group: Tenant Administrator for project OBS in region Global service, and CSS Administrator for the current region.

   For details, see Viewing and Modifying User Group Information.

Parent topic: FAQs