You can call this operation to query the snapshot chains of one or more disks. A snapshot chain is a chain of all the snapshots created for a disk. A disk corresponds to a chain of snapshots.


When you call this operation, take note of the following items:

  • You can specify multiple request parameters such as RegionId, DiskIds, and InstanceId to be queried. Specified parameters have logical AND relations.
  • Only the specified parameters are used as filter conditions. If both DiskIds and SnapshotLinkIds are set to empty JSON arrays, they are regarded as valid filter conditions and an empty response is returned.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes DescribeSnapshotLinks

The operation that you want to perform. Set the value to DescribeSnapshotLinks.

RegionId String Yes cn-hangzhou

The region ID of the disk. You can call the DescribeRegions operation to query the most recent region list.

InstanceId String No i-bp1h6jmbefj2cyqs****

The ID of the instance.

DiskIds String No ["d-bp1d6tsvznfghy7y****", "d-bp1ippxbaql9zet7****", ... "d-bp1ib7bcz07lcxa9****"]

The IDs of the disks. The value is a JSON array that consists of up to 100 disk IDs. Separate multiple disk IDs with commas (,).

SnapshotLinkIds String No ["sl-bp1grgphbcc9brb5****", "sl-bp1c4izumvq0i5bs****", ... "sl-bp1akk7isz866dds****"]

The IDs of the snapshot chains. The value is a JSON array that consists of up to 100 snapshot chain IDs. Separate multiple snapshot chain IDs with commas (,).

PageNumber Integer No 1

The number of the page to return. Pages start from page 1.

Default value: 1

PageSize Integer No 50

The number of entries to return on each page. Valid values: 1 to 100.

Default value: 10.

Response parameters

Parameter Type Example Description
PageNumber Integer 1

The page number of the returned page.

PageSize Integer 50

The number of entries returned per page.

RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

The ID of the request.

SnapshotLinks Array of SnapshotLink

Details about the snapshot chains.

Category String standard

The category of the snapshot.

Note This parameter will be removed in the future. We recommend that you use the InstantAccess parameter to ensure future compatibility.
InstanceId String i-bp1h6jmbefj2cyqs****

The ID of the instance.

InstanceName String testInstanceName

The name of the instance.

InstantAccess Boolean false

Indicates whether the instant access feature is enabled. Valid values:

  • true: The instant access feature is enabled. This feature can be enabled only for enhanced SSDs (ESSDs).
  • false: The instant access feature is disabled The snapshot is a normal snapshot for which the instant access feature is disabled.
RegionId String cn-hangzhou

The ID of the region in which the source disk of the snapshot chain is located.

SnapshotLinkId String sl-2ze0y1jwzpb1geqx****

The ID of the snapshot chain.

SourceDiskId String d-bp1d6tsvznfghy7y****

The ID of the source disk. This parameter is retained even if the source disk is deleted.

SourceDiskName String testSourceDiskName

The name of the source disk.

SourceDiskSize Integer 40

The capacity of the source disk. Unit: GiB.

SourceDiskType String data

The category of the source disk. Valid values:

  • system: system disk
  • data: data disk
TotalCount Integer 1

The total number of snapshots.

TotalSize Long 2097152

The total capacity of all snapshots in the snapshot chain. Unit: byte.

TotalCount Integer 9

The total number of snapshot chains.


Sample requests
&DiskIds=["d-bp1d6tsvznfghy7y****", "d-bp1ippxbaql9zet7****", ... "d-bp1ib7bcz07lcxa9****"]
&SnapshotLinkIds=["sl-bp1grgphbcc9brb5****", "sl-bp1c4izumvq0i5bs****", ... "sl-bp1akk7isz866dds****"]
&<Common request parameters>

Sample success responses

XML format


JSON format

    "SnapshotLinks": {
        "SnapshotLink": [
                "InstanceName": "testInstanceName1",
                "TotalCount": 1,
                "Category": "standard",
                "SourceDiskSize": 40,
                "InstanceId": "i-bp1dh0xo8nucqe1o****",
                "SnapshotLinkId": "sl-bp1hgvjgqo3wn8u7****",
                "SourceDiskName": "testSourceDiskName1",
                "RegionId": "",
                "SourceDiskType": "system",
                "TotalSize": 3806330880,
                "SourceDiskId": "d-bp149tb0mqn0boy6****"
                "InstanceName": "testInstanceName2",
                "TotalCount": 1,
                "Category": "standard",
                "InstanceId": "i-bp1c84ts5f4b6t6z****",
                "SnapshotLinkId": "sl-bp163h35n7endbpv****",
                "SourceDiskName": "testSourceDiskName2",
                "RegionId": "",
                "TotalSize": 2709520384,
                "SourceDiskType": "data",
                "SourceDiskId": "d-bp1cl4hqnh0i2u5h****"
    "PageNumber": 1,
    "PageSize": 1,
    "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
    "TotalCount": 2

Error codes

HTTP status code Error code Error message Description
400 InvalidRegionId The specified regionId is invalid. The error message returned because the specified RegionId parameter is invalid.
400 InvalidSnapshotLinkIds The specified snapshotLinkIds is invalid. The error message returned because the specified SnapshotLinkIds parameter is invalid.
400 InvalidDiskIds The specified diskIds is invalid. The error message returned because the specified DiskIds parameter is invalid.
500 InternalError The request processing has failed due to some unknown error. The error message returned because an internal error has occurred. Try again later. If the error persists, submit a ticket.

For a list of error codes, visit the API Error Center.