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Andrew
Asked: 2013-12-05 16:23:00 +0800 CST

Why is my vSphere disk now thick provisioned?

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I have a vSphere 5.0 VM that was created with entirely thin-provisioned disks (I don't have any other options when creating them). A year later, one of the disks is now no longer thin provisioned but is Thick Provision Eager Zeroed.

I'm not licensed for storage vMotion (I do have normal vMotion), it hasn't ever been migrated between datastores via offline migration and as far as I'm aware nobody has manually inflated VMDKs.

I do know that at one point the filesystem on the disk in question became full; would this have triggered a conversion to thick provisioned?

vmware-vsphere

1 Answers

  1. Best Answer

    By filling the disk, the VM was fully provisioned, no? You don't get that space back unless you zero the free space and potentially run a VMware-based storage operation...

    See:

    How to shrink a VMware virtual disk (vmdk)

    With ESXi and Windows Server 2008, can the provisioned size for a disk be reduced?

    How can the "actual" size of VHD/VMDK files be reduced after deleting unwanted files?

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