How to add datastore on ESX and how it will be visible to all ESX servers?

How to add datastore on ESX and how it will be visible to all ESX servers? 

Launch vSphere Client -> Click on the top node in the left tree -> Configuration tab -> Click on the storage menu item under “Hardware” section, as shown below. This storage section, will display all available VMware datastores as shown below.


Fig: Vmware ESX Datastores

For example, the current VMware datastore1 on this ESXi server has following information.

  • Volume Label ( Datastore ): datastore1
  • device: locall dell disk ( naa.xxxx )
  • Capacity: 131 G
  • Free: 2.45 GB
  • File system: vmfs3

Please note that the VMS file system can be created across multiple partitions to form one logical VMFS volume.

Create VMFS Datastore – Select ESX Storage Type

Click on ‘Add Storage..’ link on the top right hand corner, which will display the “Add Storage” wizard.

The first step is to specicy the esx storage type for the new ESX VMFS datastore. Select Disk/LUN as shown below. (other option is to select network file system – nfs datastore)




Fig: Select ESXi Storage Type – Disk/LUN

Select Disk/LUN

This step will display all the available disk groups on the server. This is a dell poweredge 2950 server, which already has a raid-1 logical disk group created at the hardware raid level. The raid-1 diskgroup that was created at the hardware level is now visible to the ESXi server. If you have more than one diskgroup available to the hardware, they’ll be listed here.


Fig: vSphere VMware Select disk

Current Disk Layout Configuration

This is only a information screen that says that the hard disk is blank etc.,. Click on Next to continue


Fig: VMware VMFS Disk Layout Configuration

Specify the VMFS datastore name in the properties screen.


Fig: VMFS datastore Name

Disk/LUN Formatting

Specify the maximum file size for this esx datastore. In this example, I selected 256GB as maximum file size with 1MB block size. Following options are available for the maximum file size:

  • 256 GB, Block size: 1 MB
  • 512 GB, Block size: 2 MB
  • 1024 GB, Block size: 4 MB
  • 2048 GB, Block size: 8 MB

Leave the capacity check-box as maximum capacity.


Fig: VMware Datastore Disk Formatting

Final confirmation – Ready to Complete

The final confirmation section confirms our selection as shown below.


Fig: VMware Datastore creation confirmation

New ESX datastore Created

The new datastore3 is created as shown below.


Fig: New VMware ESXi Datastore created

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