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

vSphere Storage3 As the space used by the datastore increases and reaches the specified soft threshold, the followingactions take place:abThe storage array reports the breach to your host.Your host triggers a warning alarm for the datastore.You can contact the storage administrator to request more physical space or use Storage vMotion toevacuate your virtual machines before the LUN runs out of capacity.4 If no space is left to allocate to the thin-provisioned LUN, the following actions take place:aThe storage array reports out-of-space condition to your host.CAUTION In certain cases, when a LUN becomes full, it might go offline or get unmapped from thehost.bThe host pauses virtual machines and generates an out-of-space alarm.You can resolve the permanent out-of-space condition by requesting more physical space from thestorage administrator.Identify Thin-Provisioned Storage DevicesUse the esxcli command to verify whether a particular storage device is thin-provisioned.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.ProcedureuRun the esxcli --server=server_name storage core device list -d=device_ID command.The following thin provisioning status indicates that the storage device is thin-provisioned.# esxcli --server=server_name storage core device list -d naa.XXXXXXXXXXXX4cnaa.XXXXXXXXXXXX4cDisplay Name: XXXX Fibre Channel Disk(naa.XXXXXXXXXXXX4c)Size: 20480Device Type: Direct-AccessMultipath Plugin: NMP---------------------Thin Provisioning Status: yesAttached Filters: VAAI_FILTERVAAI Status: supported---------------------An unknown status indicates that a storage device is thick.NOTE Some storage systems present all devices as thin-provisioned no matter whether the devices are thinor thick. Their thin provisioning status is always yes. For details, check with your storage vendor.250 VMware, Inc.