vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
vSphere Storage - ESXi 5.1 - Documentation - VMware
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<strong>vSphere</strong> <strong>Storage</strong><br />
The following thin provisioning status indicates that the storage device is thin-provisioned.<br />
# esxcli --server=server_name storage core device list -d naa.XXXXXXXXXXXX4c<br />
naa.XXXXXXXXXXXX4c<br />
Display Name: XXXX Fibre Channel Disk(naa.XXXXXXXXXXXX4c)<br />
Size: 20480<br />
Device Type: Direct-Access<br />
Multipath Plugin: NMP<br />
---------------------<br />
Thin Provisioning Status: yes<br />
Attached Filters: VAAI_FILTER<br />
VAAI Status: supported<br />
---------------------<br />
An unknown status indicates that a storage device is thick.<br />
NOTE Some storage systems present all devices as thin-provisioned no matter whether the devices are thin or<br />
thick. Their thin provisioning status is always yes. For details, check with your storage vendor.<br />
Disable Space Reclamation<br />
Use the esxcli command to disable space reclamation on a thin-provisioned LUN.<br />
When you delete virtual machine files from a VMFS datastore, or migrate them through <strong>Storage</strong> vMotion, the<br />
datastore frees blocks of space and informs the storage array, so that the blocks can be reclaimed. If you do not<br />
need thin provisioned LUNs to reclaim the freed space, you can disable space reclamation on the host.<br />
NOTE As with any advanced settings, before disabling the space reclamation, consult with the <strong>VMware</strong> support<br />
team.<br />
In the procedure, --server=server_name specifies the target server. The specified target server prompts you<br />
for a user name and password. Other connection options, such as a configuration file or session file, are<br />
supported. For a list of connection options, see Getting Started with <strong>vSphere</strong> Command-Line Interfaces.<br />
Prerequisites<br />
Install vCLI or deploy the <strong>vSphere</strong> Management Assistant (vMA) virtual machine. See Getting Started with<br />
<strong>vSphere</strong> Command-Line Interfaces. For troubleshooting , run esxcli commands in the <strong>ESXi</strong> Shell.<br />
Procedure<br />
u Run the following command:<br />
esxcli --server=server_name system settings advanced set --int-value 0 -option<br />
/VMFS3/EnableBlockDelete.<br />
Reclaim Accumulated <strong>Storage</strong> Space<br />
When VMFS datastores reside on thin-provisioned LUNs, you can use the vmkfstools -y to reclaim storage<br />
blocks resulting from deleting or moving files from the VMFS datastores.<br />
IMPORTANT You can use this command only if your storage vendor has tested this option with storage arrays<br />
and supports it. For information on how to verify whether the array supports this command, see the <strong>VMware</strong><br />
knowledge base article at http://kb.vmware.com/kb/2014849.<br />
Prerequisites<br />
n Upgrade your host to <strong>ESXi</strong> <strong>5.1</strong>.<br />
n Upgrade a datastore deployed on the thin-provisioned device to VMFS5.<br />
232 <strong>VMware</strong>, Inc.
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