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Knowledge Base

Cannot grow VMFS datastore, the Increase button is disabled (1035285)

Last Updated: 3/20/2024Categories: TroubleshootingTotal Views: 22325Language:
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Symptoms

Attempting to increase the size of a VMFS Datastore fails

The Increase button is disabled in the vSphere Client

Resolution

The Increase button will be disabled under two conditions:

In a mixed environment comprised of both ESX 3.x and 4.x and ESXi 5.x hosts.

When the Datastore is on a Snapshot LUN that has been force-mounted.

Mixed Environment

Increasing the size of an existing datastore is a new feature introduced in vSphere 4.x, and is not available with previous versions. The Increase functionality may not be available in a mixed environment of ESX/ESXi 3.x and 4.x/ESXi 5.x hosts managed by the same vCenter Server.

To workaround this limitation, connect the vSphere Client to an ESX/ESXi 4.x/ESXi 5.x host directly, and use the Increase button there to grow the datastore.

Force mounted

When a LUN contains a VMFS datastore copy (snapshot), you can mount the datastore with the existing signature or assign a new signature. For more information, see the Managing Duplicate VMFS Datastores section of the vSphere ESX Configuration Guide.

Adding an extent to or growing an extent in a force mounted VMFS datastore volume is not supported. The Increase button is disabled under this condition.

To increase the size of a VMFS Datastore copy, use datastore resignaturing to assign a new UUID and label to the datastore. For more information, see the Resignaturing VMFS Copies section of the vSphere ESX Configuration Guide.

Note: If the resignatured datastore contains virtual machines, you must update references to the original VMFS datastore in the virtual machine files. The virtual machines must be re-registered with vCenter Server. For more information, see Unable to power on a virtual machine after a volume resignature (1007022).

Related Information

For more information, see the Understanding VMFS Datastores section of the vSphere SAN Configuration Guide.
Unable to power on a virtual machine after a volume resignature
VMFS データストアを拡張できず、[増加] ボタンが無効化される

Detectable by VMware SkylineTM

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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Download and Install VMware Fusion (2014097)

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