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VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE MANUAL
VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE DOWNLOAD
VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE FREE

Note : sometimes you may get the same error again but the snapshot will get deleted even though it is showing the same error. When you have some VMs with thin provisioned disks, you may have noticed that these will continue to grow, and never shrink, even after cleaning out data from within the VM.Currently, VMware does not have automatic space reclamation. Overcommit means that if all thin disks were fully provisioned, there would not be enough space to accommodate all of the thin disks. Actual size is the current size of the thin disk. Go back to the vm and initiate the snapshot removal again. Provisioned size for a thin disk is the maximum size the disk will occupy when fully allocated. Create a temp folder on the same datastoreĢ. Also, if this is ESXi version 4, and the virtual disk is thin provisioned at the VMware layer (even on local storage), defragmenting will make the VMDK use more space as new. “ SNAPSHOT: SnapshotConsolidateOpenDisks failed: Could not open/create change tracking file”ġ. There may be thin provisioning or deduplication going on at a layer VMware doesnt know about, and defragmenting can make the VM use a lot more space or even perform worse. Open the file with wordpad or notepad and look for the error on the snapshot removal initiated time.

VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE DOWNLOAD

Note : the time might be in the UTC time if the esxi host is in UTC.ĥ.Look for the error on the specific time snapshot removal was initiated, the error will be “ SNAPSHOT: SnapshotConsolidateOpenDisks failed: Could not open/create change tracking file “ġ.In the vsphere client browse the datastore and navigate to the virtual machine fileĢ.Select the vmware.log file the current one and download to your desktop.ģ. dd if/dev/zero of/MYFILE bs1M rm /MYFILE) and the space is freed again on the zvol side.

VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE FREE

If you do this on the parent image of a View Pool the changes won’t be “pushed” out to the VM’s within the Pool until your next recompose.2.navigate the virtual machine file path Cd /vmfs/volumes/storage lun name/virtual machine name /Ĥ.hit space bar to see the log entries for the specific time With this in place, a host wishing to free thin provisioned zvol space can fill the unused blocks wirth 0s easity with simple tools (e.g. If all went well you should now have a smaller VMDK file and newly reclaimed space! For VMFS6, reclamation granularity equals the block size. I n VMware ESXi 6.5 and above there is a limitation of if any array unmap granularity is greater than 1MB then automatic unmap not supported.

Once complete, again check the size by repeating step 2. Please note eventhough ESX 6.7 supports automatic space reclaim but it will not work with MSA because MSA works with 4 MB pages only.

Now we’ll punch all the zeroed blocks out of the VMDK file by typing, replacing with the name of the VM VMDK file: vmkfstools -punchzero.

Power off the VM and SSH into your ESXi host and navigate to the VMDK’s datastore -> directory and check the VM’s current size by typing:.

Note: In Linux VM’s you’ll want to run this command, replacing with the actual path of the storage: dd if=/dev/zero of=//zeroes bs=4096 & rm -f //zeroes Any suggestions would be greatly appreciated.

Download SDelete onto the VM you want to shrink and run the following command, replacing with the actual drive letter to be reduced: sdelete.exe -z I have deleted a thick provisioned disk off from one of my VMs and wonder if there's a way to reclaim the space besides converting the VM.

A simple way of doing this is by using a free utility called SDelete from Sysinternals.

VMWARE ESXI 5 RECLAIMING THIN PROVISIONED DISK UNUSED SPACE MANUAL

While there isn’t a simple, one click button in the View Administrator Console there is a fairly easy manual method using vmfkstools.īefore we can use “vmkfstools” to shrink the VMDK file we must zero out any unused space on the thin provisioned disk. When maintaining a Horizon View environment I like to keep my parent images as small as possible and over time a thin provision disk can start to grow on you if you don’t watch it – be it from downloading installers, updates, or even running disk defrag.