harmony 鸿蒙@ohos.volumeManager (Volume Management)

  • 2022-08-09
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@ohos.volumeManager (Volume Management)

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

NOTE

  • The initial APIs of this module are supported since API version 9.
  • The APIs of this module are system APIs and cannot be called by third-party applications.

Modules to Import

import volumemanager from "@ohos.volumeManager";

volumemanager.getAllVolumes

getAllVolumes(): Promise<Array<Volume>>

Asynchronously obtains information about all available volumes. This API uses a promise to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Return value

Type Description
Promise<Volume[]> Promise used to return the execution result.

Example

  volumemanager.getAllVolumes().then(function(volumes){
      // Do something.
  });

volumemanager.getAllVolumes

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

Asynchronously obtains information about all available volumes. This API uses a callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
callback AsyncCallback<Volume[]> Yes Callback invoked to return the volume information obtained.

Example

  let uuid = "";
  volumemanager.getAllVolumes(function(error, volumes){
      // Do something
  });

volumemanager.mount

mount(volumeId: string): Promise<boolean>

Asynchronously mounts 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

Name Type Mandatory Description
volumeId string Yes Volume ID.

Return value

Type Description
Promise<boolean> Promise used to return the execution result.

Example

  let volumeId = "";
  volumemanager.mount(volumeId).then(function(flag){
      // Do something
  });

volumemanager.mount

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

Asynchronously obtains the available space of the specified volume. This API uses a callback to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
volumeId string Yes Volume ID.
callback AsyncCallback<boolean> Yes Callback invoked to return the execution result.

Example

  let volumeId = "";
  volumemanager.mount(volumeId, function(error, flag){
      // Do something
  });

volumemanager.unmount

unmount(volumeId: string): Promise<boolean>

Asynchronously 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

Name Type Mandatory Description
volumeId string Yes Volume ID.

Return value

Type Description
Promise<boolean> Promise used to return the execution result.

Example

  let volumeId = "";
  volumemanager.unmount(volumeId).then(function(flag){
      // Do something
  });

volumemanager.unmount

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

Asynchronously unmounts a volume. This API uses a callback to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
volumeId string Yes Volume ID.
callback AsyncCallback<boolean> Yes Callback invoked to return the execution result.

Example

  let volumeId = "";
  volumemanager.unmount(volumeId, function(error, flag){
      // Do something
  });

volumemanager.getVolumeByUuid

getVolumeByUuid(uuid: string): Promise<Volume>

Asynchronously obtains volume information 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

Name Type Mandatory Description
uuid string Yes UUID of the volume.

Return value

Type Description
Promise<Volume> Promise used to return the volume information obtained.

Example

  let uuid = "";
  volumemanager.getVolumeByUuid(uuid).then(function(volume) {
      console.info("getVolumeByUuid successfully:" + JSON.stringify(volume));
  }).catch(function(error){
      console.info("getVolumeByUuid failed with error:"+ error);
  });

volumemanager.getVolumeByUuid

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

Asynchronously obtains volume information based on the UUID. This API uses a callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
uuid string Yes UUID of the volume.
callback AsyncCallback<Volume> Yes Callback invoked to return the volume information obtained.

Example

  let uuid = "";
  volumemanager.getVolumeByUuid(uuid, (error, volume) => {
      // Do something.   
  });

volumemanager.getVolumeById

getVolumeById(volumeId: string): Promise<Volume>

Asynchronously obtains volume information 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

Name Type Mandatory Description
volumeId string Yes Volume ID.

Return value

Type Description
Promise<Volume> Promise used to return the volume information obtained.

Example

  let volumeId = "";
  volumemanager.getVolumeById(volumeId).then(function(volume) {
      console.info("getVolumeById successfully:" + JSON.stringify(volume));
  }).catch(function(error){
      console.info("getVolumeById failed with error:"+ error);
  });

volumemanager.getVolumeById

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

Asynchronously obtains volume information based on the volume ID. This API uses a callback to return the result.

Required permissions: ohos.permission.STORAGE_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
volumeId string Yes Volume ID.
callback AsyncCallback<Volume> Yes Callback invoked to return the volume information obtained.

Example

  let volumeId = "";
  volumemanager.getVolumeById(volumeId, (error, volume) => {
      // Do something.   
  });

volumemanager.setVolumeDescription

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

Asynchronously sets the volume description based on the UUID. This API uses a promise to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
uuid string Yes UUID of the volume.
description string Yes Volume description.

Return value

Type Description
Promise<void> Promise used to return the result.

Example

  let uuid = "";
  let description = "";
  volumemanager.setVolumeDescription(uuid, description).then(function() {
      console.info("setVolumeDescription successfully");
  }).catch(function(error){
      console.info("setVolumeDescription failed with error:"+ error);
  });

volumemanager.setVolumeDescription

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

Asynchronously sets the volume description based on the UUID. This API uses a callback to return the result.

Required permissions: ohos.permission.MOUNT_UNMOUNT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
uuid string Yes UUID of the volume.
description string Yes Volume description.
callback AsyncCallback<void> Yes Callback invoked to return the result.

Example

  let uuid = "";
  let description = "";
  volumemanager.setVolumeDescription(uuid, description, (error, bool) => {
      // Do something.   
  });

volumemanager.format

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

Asynchronously formats a volume. This API uses a promise to return the result.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
volumeId string Yes Volume ID.
fsType string Yes File system type.

Return value

Type Description
Promise<void> Promise used to return the result.

Example

  let volumeId = "";
  let fsType = "";
  volumemanager.format(volumeId, fsType).then(function() {
      console.info("format successfully");
  }).catch(function(error){
      console.info("format failed with error:"+ error);
  });

volumemanager.format

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

Asynchronously formats a volume. This API uses a callback to return the result.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
volumeId string Yes Volume ID.
fsType string Yes File system type.
callback AsyncCallback<void> Yes Called after the volume is formatted.

Example

  let volumeId = "";
  let fsType = "";
  volumemanager.format(volumeId, fsType, (error, bool) => {
      // Do something.   
  });

volumemanager.partition

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

Asynchronously partitions a disk. This API uses a promise to return the result.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
diskId string Yes ID of the disk to which the volume belongs.
type number Yes Partition type.

Return value

|Type |Description | |———————|———————–| |Promise<void> |Promise used to return the result. |

Example

  let diskId = "";
  let type = 0;
  volumemanager.partition(diskId, type).then(function() {
      console.info("partition successfully");
  }).catch(function(error){
      console.info("partition failed with error:"+ error);
  });

volumemanager.partition

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

Asynchronously partitions a disk. This API uses a callback to return the result.

Required permissions: ohos.permission.MOUNT_FORMAT_MANAGER

System capability: SystemCapability.FileManagement.StorageService.Volume

Parameters

Name Type Mandatory Description
diskId string Yes ID of the disk to which the volume belongs.
type number Yes Partition type.
callback AsyncCallback<void> Yes Callback invoked to return the result.

Example

  let diskId = "";
  let type = 0;
  volumemanager.partition(diskId, type, (error, bool) => {
      // Do something.   
  });

Volume

System capability: SystemCapability.FileManagement.StorageService.Volume

Attributes

Name Type Readable Writable Description
id string Yes No Volume ID.
uuid string Yes No UUID of the volume.
diskId string Yes No ID of the disk to which the volume belongs.
description string Yes No Description of the volume.
removable boolean Yes No Whether the volume is a removable storage device.
state number Yes No Volume state.
path string Yes No Mount address of the volume.

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