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Reclaiming disk space from thin provisioned VMDK files on ESXi |
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Article Number: 106 | Rating: Unrated | Last Updated: Sun, Feb 27, 2022 at 4:11 PM
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Step 1: Delete the blocks on the Guest OSWindows Operating System
Note: SDelete -z will cause the guest OS to use up 100% of the available space disk during this process while zeroing free space. This will lead to a temporary increase in used space on the datastore.
sdelete.exe -z drive_letter:
Note: Replace [drive:] with the target disk or partition. Note that when you have multiple partitions on a single virtual disk, you need to do this on all partitions for it to be effective. Otherwise, reclamation will only be partial because not every data block will be zeroed.
Linux Operating Systems:
Linux has different ways to delete the unused blocks, the most common method is to fill the free space with a file of zeroes using the dd command: $ dd if=/dev/zero of=/mounted-volume/zeroes && rm -f /mounted-volume/zeroes
Notes:
Step 2: Reclaim space on VMFS
cd /vmfs/volumes/DATASTORE_NAME/VM_NAME
vmkfstools -K disk_name.vmdk
Notes:
Refs: |
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