# Data Object - VirtualDiskFlatVer2BackingOption(vim.vm.device.VirtualDiskOption.FlatVer2BackingOption)

Extends
  VirtualDeviceFileBackingOption
See also
  BoolOption, ChoiceOption, VirtualDiskDeltaDiskFormatsSupported

## Data Object Description

This data object type contains the available options when backing a virtual disk using a host file with the flat file format used in VMware Server and in ESX Server 2.x and greater. Flat disks are pre-allocated, whereas sparse disks are grown as needed.

Properties

Name | Type | Description
--- | --- | ---
deltaDiskFormat | ChoiceOption | Deprecated. As of vSphere API 5.1, please use deltaDiskFormatsSupported. Delta disk formats supported. Valid values are: redoLogFormat nativeFormat Since vSphere API 5.0
deltaDiskFormatsSupported | VirtualDiskDeltaDiskFormatsSupported[] | Delta disk formats supported for each datastore type. Since vSphere API 5.1
diskMode | ChoiceOption | The disk mode. Valid disk modes are: persistent independent_persistent independent_nonpersistent See VirtualDiskMode
eagerlyScrub | BoolOption | Flag to indicate if this backing supports eager scrubbing. Since vSphere API 4.0
growable | xsd:boolean | Indicates whether or not this disk backing can be extended to larger sizes through a reconfigure operation. If set to true, reconfiguring this virtual disk with a capacityInKB value greater than its current value will grow the disk to the newly specified size.
hotGrowable | xsd:boolean | Indicates whether or not this disk backing can be extended to larger sizes through a reconfigure operation while the virtual machine is powered on. If set to true, reconfiguring this virtual disk with a capacityInKB value greater than its current value will grow the disk to the newly specified size while the virtual machine is powered on. Since VI API 2.5
split | BoolOption | Flag to indicate whether or not the host supports allowing the client to select whether or not a disk should be split.
thinProvisioned | BoolOption | Flag to indicate if this backing supports thin-provisioned disks. When creating a thin-provisioned disk (or converting an existing disk to to a thin-provisioned one), both the target datastore and the host accessing it must support thin-provisioning. This flag indicates only the host capability. See perFileThinProvisioningSupported for datastore capability. Since vSphere API 4.0
uuid | xsd:boolean | Flag to indicate whether this backing supports disk UUID property. Since VI API 2.5
writeThrough | BoolOption | Flag to indicate whether or not the host supports allowing the client to select "writethrough" as a mode for virtual disks. Typically, this is available only for VMware Server Linux hosts.
Properties inherited from VirtualDeviceFileBackingOption
fileNameExtensions
Properties inherited from VirtualDeviceBackingOption
type
Properties inherited from DynamicData
None

Show WSDL type definition
<complexType xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vsan="urn:vsan" name="VirtualDiskFlatVer2BackingOption"> <complexContent> <extension base="vsan:VirtualDeviceFileBackingOption"> <sequence> <element name="diskMode" type="vsan:ChoiceOption"/> <element name="split" type="vsan:BoolOption"/> <element name="writeThrough" type="vsan:BoolOption"/> <element name="growable" type="xsd:boolean"/> <element name="hotGrowable" type="xsd:boolean" minOccurs="0"/> <element name="uuid" type="xsd:boolean" minOccurs="0"/> <element name="thinProvisioned" type="vsan:BoolOption" minOccurs="0"/> <element name="eagerlyScrub" type="vsan:BoolOption" minOccurs="0"/> <element name="deltaDiskFormat" type="vsan:ChoiceOption" minOccurs="0"/> <element name="deltaDiskFormatsSupported" type="vsan:VirtualDiskDeltaDiskFormatsSupported" minOccurs="0" maxOccurs="unbounded"/> </sequence> </extension> </complexContent> </complexType>