Thin provisioned VMDK consume all available space

Hello

  • Server: Win 2008 R2 with SP1 (file server)
  • Storage: VMDK on VMFS5 datastore (thin provisioned), which underlies the SAN fiber storage
  • vSphere: vCenter Server Standard 5, ESXi 5.0 Patch 2 (build 515841)

... So, I have a VM file server running Windows 2008 R2 with SP1.  The system (c) partition has been successfully thin (VMDK using 13 GB to 40 GB).

However, for all subsequent hard disks virtual created on the server, the NTFS partition is very slow to get into shape - and the actual size of the VMDK creeps slowly up to the size of the VHD (you can see the gradual rise of the VMDK size in the browser to store data during the formatting process).

The VMFS data store that we create new virtual hard disks is version 5.  All virtual machines with virtual hard disks on VMFS version 3 seem to be supplied thin OK.

Nobody knows what could happen here?

Hello

Do you use quick format?

Otherwise, your score will take up any space. Check here:VMware KB: using thin provisioned disks with virtual machines

"If a guest operating system needs to use a virtual disk, the must invited first operating system partition and format the drive in a file system it can recognize." Depending on the format selected in the guest operating system, the format can cause the disc thin provisioned in full size.

For example, if you have a drive end with a Microsoft Windows operating system implemented and format the drive, unless you explicitly choose to fast formatting, Microsoft Windows format tool written information to all sectors on the disk, which in turn inflates the disc thin provisioned in full size. "

Kind regards

Julien.

Tags: VMware

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