@ohos.file.volumeManager (Volume Management) (System API)

The volumeManager module provides APIs for querying and managing volumes and disks, including querying volume information, mounting or unmounting a volume, partitioning a disk, and formatting a volume.

NOTE

• The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
• The APIs provided by this module are system APIs.

Modules to Import

import volumemanager from "@ohos.file.volumeManager";

volumemanager.getAllVolumes

getAllVolumes(): Promise<Array<Volume>>

Obtains information about all volumes of this external storage device. This API uses a promise to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  volumemanager.getAllVolumes().then((volumes: Array<volumemanager.Volume>) => {
    // do something with volumes, which is an array
  }).catch((error: BusinessError) => {
    console.error("getAllVolumes failed");
  });

volumemanager.getAllVolumes

getAllVolumes(callback: AsyncCallback<Array<Volume>>): void

Obtains information about all volumes of this external storage device. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  volumemanager.getAllVolumes((error: BusinessError, volumes: Array<volumemanager.Volume>) => {
    // Do something.
  });

volumemanager.mount

mount(volumeId: string): Promise<void>

Mounts a volume. This API uses a promise to return the result. Currently, only the FAT, exFAT, and NTFS file systems are supported.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.mount(volumeId).then(() => {
    // Do something.
  }).catch((error: BusinessError) => {
    console.error("mount failed");
  });

volumemanager.mount

mount(volumeId: string, callback:AsyncCallback<void>):void

Mounts a volume. This API uses an asynchronous callback to return the result. Currently, only the FAT, exFAT, and NTFS file systems are supported.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.mount(volumeId, (error: BusinessError) => {
    // Do something.
  });

volumemanager.unmount

unmount(volumeId: string): Promise<void>

Unmounts a volume. This API uses a promise to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.unmount(volumeId).then(() => {
    // Do something.
  }).catch((error: BusinessError) => {
    console.error("mount failed");
  });

volumemanager.unmount

unmount(volumeId: string, callback: AsyncCallback<void>): void

Unmounts a volume. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.unmount(volumeId, (error: BusinessError) => {
    // Do something.
  });

volumemanager.getVolumeByUuid

getVolumeByUuid(uuid: string): Promise<Volume>

Obtains information about a volume based on the universally unique identifier (UUID). This API uses a promise to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let uuid: string = "";
  volumemanager.getVolumeByUuid(uuid).then((volume: volumemanager.Volume) => {
    console.info("getVolumeByUuid successfully:" + JSON.stringify(volume));
  }).catch((error: BusinessError) => {
    console.error("getVolumeByUuid failed with error:" + JSON.stringify(error));
  });

volumemanager.getVolumeByUuid

getVolumeByUuid(uuid: string, callback: AsyncCallback<Volume>): void

Obtains information about a volume based on the UUID. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let uuid: string = "";
  volumemanager.getVolumeByUuid(uuid, (error: BusinessError, volume: volumemanager.Volume) => {
    // Do something.   
  });

volumemanager.getVolumeById

getVolumeById(volumeId: string): Promise<Volume>

Obtains information about a volume based on the volume ID. This API uses a promise to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.getVolumeById(volumeId).then((volume: volumemanager.Volume) => {
    console.info("getVolumeById successfully:" + JSON.stringify(volume));
  }).catch((error: BusinessError) => {
    console.error("getVolumeById failed with error:" + JSON.stringify(error));
  });

volumemanager.getVolumeById

getVolumeById(volumeId: string, callback: AsyncCallback<Volume>): void

Obtains information about a volume based on the volume ID. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  volumemanager.getVolumeById(volumeId, (error: BusinessError, volume: volumemanager.Volume) => {
    // Do something.   
  });

volumemanager.setVolumeDescription

setVolumeDescription(uuid: string, description: string): Promise<void>

Sets volume description. This API uses a promise to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let uuid: string = "";
  let description: string = "";
  volumemanager.setVolumeDescription(uuid, description).then(() => {
    console.info("setVolumeDescription successfully");
  }).catch((error: BusinessError) => {
    console.error("setVolumeDescription failed with error:" + JSON.stringify(error));
  });

volumemanager.setVolumeDescription

setVolumeDescription(uuid: string, description: string, callback: AsyncCallback<void>): void

Sets volume description. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let uuid: string = "";
  let description: string = "";
  volumemanager.setVolumeDescription(uuid, description, (error: BusinessError) => {
    // Do something.   
  });

volumemanager.format

format(volumeId: string, fsType: string): Promise<void>

Formats a volume. This API uses a promise to return the result. Currently, only the virtual file allocation table (VFAT) and exFAT file systems are supported. Only unmounted volumes can be formatted. After a volume is formatted, the UUID, mounting path, and description of the volume change.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  let fsType: string = "";
  volumemanager.format(volumeId, fsType).then(() => {
    console.info("format successfully");
  }).catch((error: BusinessError) => {
    console.error("format failed with error:" + JSON.stringify(error));
  });

volumemanager.format

format(volumeId: string, fsType: string, callback: AsyncCallback<void>): void

Formats a volume. This API uses an asynchronous callback to return the result. Currently, only the VFAT and exFAT file systems are supported. Only unmounted volumes can be formatted. After a volume is formatted, the UUID, mounting path, and description of the volume change.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let volumeId: string = "";
  let fsType: string = "";
  volumemanager.format(volumeId, fsType, (error: BusinessError) => {
    // Do something.   
  });

volumemanager.partition

partition(diskId: string, type: number): Promise<void>

Partitions a disk. This API uses a promise to return the result. The system supports access to multi-partition disks. Currently, this API can partition a disk into only one partition.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Return value

|Type |Description | |———————|———————–| |Promise<void> |Promise that returns no value. |

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let diskId: string = "";
  let type: number = 0;
  volumemanager.partition(diskId, type).then(() => {
    console.info("partition successfully");
  }).catch((error: BusinessError) => {
    console.error("partition failed with error:" + JSON.stringify(error));
  });

volumemanager.partition

partition(diskId: string, type: number, callback: AsyncCallback<void>): void

Partitions a disk. This API uses a callback to return the result. The system supports access to multi-partition disks. Currently, this API can partition a disk into only one partition.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Error codes

For details about the error codes, see File Management Error Codes.

Example

  import { BusinessError } from '@ohos.base';
  let diskId: string = "";
  let type: number = 0;
  volumemanager.partition(diskId, type, (error: BusinessError) => {
    // Do something.   
  });

Volume

System capability: SystemCapability.FileManagement.StorageService.Volume

Properties

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