Querying Information About Disks Attached to an ECS

Function

This API is used to query information about disks attached to an ECS.

URI

GET /v1/{project_id}/cloudservers/{server_id}/block_device

Table 1 describes the parameters in the URI.

**Table 1** Parameter description
Parameter	Mandatory	Description
project_id	Yes	Specifies the project ID. For details about how to obtain the ID, see Obtaining a Project ID.
server_id	Yes	Specifies the ECS ID in UUID format.

Request

None

Response

Table 2 describes the response parameters.

**Table 2** Response parameters
Parameter	Type	Description
volumeAttachments	Array of objects	Specifies the disks attached to an ECS. For details, see Table 3.
attachableQuantity	Object	Specifies the number of disks that can be attached to an ECS. For details, see Table 4.

**Table 3** **volumeAttachments** parameters
Parameter	Type	Description
serverId	String	Specifies the ECS ID in UUID format.
volumeId	String	Specifies the EVS disk ID in UUID format.
id	String	Specifies the mount ID, which is the same as the EVS disk ID. The value is in UUID format.
size	Integer	Specifies the EVS disk size in GB.
device	String	Specifies the drive letter of the EVS disk, displayed as the device name on the console. For details, see How Do I Obtain My Disk Device Name in the ECS OS Using the Device Identifier Provided on the Console?
pciAddress	String	Specifies the PCI address.
bootIndex	Integer	Specifies the EVS disk boot sequence. 0 indicates the system disk. A non-zero value indicates a data disk.
bus	String	Specifies the disk bus type. Options: virtio and scsi

**Table 4** **attachableQuantity** parameters
Parameter	Type	Description
free_scsi	Integer	Specifies the number of SCSI disks that can be attached to an ECS.
free_blk	Integer	Specifies the number of virtio_blk disks that can be attached to an ECS.
free_disk	Integer	Specifies the total number of disks that can be attached to an ECS.

Example Request

Query information about disks attached to an ECS.

GET https://{endpoint}/v1/{project_id}/cloudservers/{server_id}/block_device

Example Response

{
    "attachableQuantity": {
            "free_scsi": 23,
            "free_blk": 15,
            "free_disk": 23
     },
    "volumeAttachments": [
        {
            "pciAddress": "0000:02:01.0",
            "volumeId": "a26887c6-c47b-4654-abb5-dfadf7d3f803",
            "device": "/dev/vda",
            "serverId": "4d8c3732-a248-40ed-bebc-539a6ffd25c0",
            "id": "a26887c6-c47b-4654-abb5-dfadf7d3f803",
            "size": 40,
            "bootIndex": 0,
            "bus":"virtio"
        },
        {
            "pciAddress": "0000:02:02.0",
            "volumeId": "a26887c6-c47b-4654-abb5-asdf234r234r",
            "device": "/dev/vdb",
            "serverId": "4d8c3732-a248-40ed-bebc-539a6ffd25c0",
            "id": "a26887c6-c47b-4654-abb5-asdf234r234r",
            "size": 10,
            "bootIndex": 1,
            "bus":"virtio"
        }
    ]
}