How To Extend Datastore Capacity in the vSphere Client When your Datastore require more space, you can dynamically increase the capacity

Use one of the following methods to increase a VMFS datastore:

  • Add a new extent. An extent is a partition on a storage device. You can add up to 32 extents of the same storage type to an existing VMFS datastore. The spanned VMFS datastore can use any or all of its extents at any time. It does not need to fill up a particular extent before using the next one.
  • Grow an extent in an existing VMFS datastore, so that it fills the available adjacent capacity. Only extents with free space immediately after them are expandable.

Note
If a shared datastore has powered on virtual machines and becomes 100% full, you can increase the datastore’s capacity only from the host with which the powered on virtual machines are registered.

Prerequisites

Required privilege: Host.Configuration. Storage Partition Configuration

Procedure

Log in to the vSphere Client and select a host from the Inventory panel.

Click the Configuration tab and click Storage.

From the Datastores view, select the datastore to increase and click Properties.

Extend Datastore ESXi
Extend Datastore ESXi
Click Increase.

Select a device from the list of storage devices and click Next.

Extend Datastore ESXi
Extend Datastore ESXi
Extend Datastore ESXi
Extend Datastore ESXi

Option

To add a new extent – Select the device for which the Expandable column reads NO.

To expand an existing extent – Select the device for which the Expandable column reads YES

Review the Current Disk Layout to see the available configurations and click Next.

Select a configuration option from the bottom panel.

Depending on the current layout of the disk and on your previous selections, the options you see might vary.

Option

Use free space to add new extent – Adds the free space on this disk as a new extent.

Use free space to expand existing extent – Expands an existing extent to a required capacity.

Use free space – Deploys an extent in the remaining free space of the disk. This option is available only when you are adding an extent.

Use all available partitions – Dedicates the entire disk to a single extent. This option is available only when you are adding an extent and when the disk you are formatting is not blank. The disk is reformatted, and the datastores and any data that it contains are erased.

Extend Datastore ESXi
Extend Datastore ESXi

Set the capacity for the extent.

The minimum extent size is 1.3GB. By default, the entire free space on the storage device is available.

Click Next.

Extend Datastore ESXi
Extend Datastore ESXi

Review the proposed layout and the new configuration of your datastore, and click Finish.

Extend Datastore ESXi
Extend Datastore ESXi

What to do next

After you grow an extent in a shared VMFS datastore, refresh the datastore on each host that can access this datastore, so that the vSphere Client can display the correct datastore capacity for all hosts.

Related Article: Increase VMFS Datastore Capacity in the vSphere Client

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