vsphere-esxi-vcenter-server-55-storage-guide

Chapter 25 Storage Thin ProvisioningReclaim Accumulated Storage SpaceWhen VMFS datastores reside on thin-provisioned LUNs, you can use the esxcli command to reclaimunused storage blocks.In the procedure, --server=server_name specifies the target server. The specified target server prompts youfor a user name and password. Other connection options, such as a configuration file or session file, aresupported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.PrerequisitesInstall vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started withvSphere Command-Line Interfaces. For troubleshooting, run esxcli commands in the ESXi Shell.ProcedureuReclaim unused storage blocks on the VMFS5 datastore for the thin-provisioned device by running thefollowing command:esxcli --server=server_name storage vmfs unmap --volume-label=volume_label|--volumeuuid=volume_uuid--reclaim-unit=numberThe command takes these options:Option-l|--volume-label=volume_label-u|--volume-uuid=volume_uuid-n|--reclaim-unit=numberDescriptionThe label of the VMFS volume to unmap. This is a mandatory argument. Ifyou specify this argument, do not use -u|--volume-uuid=volume_uuid.The UUID of the VMFS volume to unmap. This is a mandatory argument.If you specify this argument, do not use-l|--volume-label=volume_label.Number of VMFS blocks to unmap per iteration. This is an optionalargument. If it is not specified, the command uses the default value of 200.What to do nextIMPORTANT For additional details, see the VMware knowledge base article athttp://kb.vmware.com/kb/2014849.VMware, Inc. 251