Insufficient disk space on datastore

[martinlui]

Hi all,

I am facing a strange problem when I resize a VMDK.

When I trying to increase the size of VMDK of a runing VM, it got a error dialog Insufficient disk space on datastore "". I have checked the datastore have enough disk space and I can add a new VMDK in other VMs. Any idea on it? Also why the dialog not show the datstore name? I have done it before without any problem.

Martin

[Linjo]

How big is the LUN?

How big is the datastore?

What version of vSphere?

What version of vmfs?

How do you try to expand the datastore?

// Linjo

[martinlui]

Hi Linjo,

The LUN size is 7.8 TB

The Datastore size is 7.8 TB free space is 830 GB

I am using vSphere 5.1

VMFS version 5

I am trying to increase 50 GB to a VMDK not datastore. So I don't know why this error prompt out.

Martin

[Linjo]

How big is the VMDK?

// Linjo

[martinlui]

Hi Linjo,

The VMDK is 410 GB

Martin

[katepalli]

How are you trying to expand the VMDK? I mean are you using GUI or vmkfstool?

If you are trying from GUI, try with that tool with VM powered off.

Chk whether any old or unwanted VMDK resided in datastore if so try to delete them.

[martinlui]

I am using GUI to resize the VMDK. Do you mean I can resize the VMDK using vmkfstool during the VM is running?

Checked there is no old or resided VMDK in datastore

Martin

[katepalli]

No you can't resize the VMDK when power on VM with vmkfstool. Try it with this tool after power off the VM.

[ThompsG]

Hi,

I know this is a silly question but what is the block size on the VMFS volume? It will be 1 MB if data store was created as VMFS5 but could be something different if VMFS was upgraded from VMFS3.

Thanks and kind regards.

[katepalli]

Yes, as Thomps said, have you upgraded that vm or VMDK from any privious versions?

[martinlui]

The VMFS is native VMFS5. Not upgrade from VMFS3.

Martin

[katepalli]

Have u try with vmkfstool?

[martinlui]

Not yet. I have to schedule a shutdown of the server. Will update if I done that.

Martin

[martinlui]

Finally figured out what is the problem. The VMDK is currently 1.8TB but the size not reflect in the GUI. GUI still show the disk size is 410 GB. Therefore I cannot increase the size of the VMDK any more. But why the GUI cannot get the correct size? Do I have to restart the VM?

Martin