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16.4. Sub-Collections
16.4.1. Statistics Sub-Collection
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		Each floating disk exposes a 
statistics sub-collection for disk-specific statistics. Each statistic contains the following elements:
	| Element | Type | Description | 
|---|---|---|
| name | string | The unique identifier for the statistic entry. | 
| description | string | A plain text description of the statistic. | 
| unit | string | The unit or rate to measure the statistical values. | 
| type | One of GAUGEorCOUNTER | The type of statistic measures. | 
| values type= | One of INTEGERorDECIMAL | The data type for the statistical values that follow. | 
| value | complex | A data set that contains datum. | 
| datum | see values type | An individual piece of data from a value. | 
| disk id= | relationship | A relationship to the containing diskresource. | 
		The following table lists the statistic types for floating disks.
	
| 
						Name
					 | 
						Description
					 | 
|---|---|
| data.current.read | 
						The data transfer rate in bytes per second when reading from the disk.
					 | 
| data.current.write | 
						The data transfer rate in bytes per second when writing to the disk.
					 | 
Example 16.3. An XML representation of a virtual machine's statistics sub-collection
Note
			This 
statistics sub-collection is read-only.