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>Storage</strong> Refresh and Rescan Operations<br />
The refresh operation for datastores, storage devices, and storage adapters updates the lists and storage<br />
information displayed in the <strong>vSphere</strong> Client or the <strong>vSphere</strong> Web Client. For example, it updates such<br />
information as the datastore capacity. When you perform storage management tasks or make changes in the<br />
SAN configuration, you might need to rescan your storage.<br />
When you perform VMFS datastore management operations, such as creating a VMFS datastore or RDM,<br />
adding an extent, and increasing or deleting a VMFS datastore, your host or the vCenter Server automatically<br />
rescans and updates your storage. You can disable the automatic rescan feature by turning off the Host Rescan<br />
Filter. See “Turn off <strong>Storage</strong> Filters,” on page 173.<br />
In certain cases, you need to perform a manual rescan. You can rescan all storage available to your host, or, if<br />
you are using the vCenter Server, to all hosts in a folder, cluster, and datacenter.<br />
If the changes you make are isolated to storage connected through a specific adapter, perform a rescan for this<br />
adapter.<br />
Perform the manual rescan each time you make one of the following changes.<br />
n Zone a new disk array on a SAN.<br />
n Create new LUNs on a SAN.<br />
n Change the path masking on a host.<br />
n Reconnect a cable.<br />
n Change CHAP settings (iSCSI only).<br />
n Add or remove discovery or static addresses (iSCSI only).<br />
n Add a single host to the vCenter Server after you have edited or removed from the vCenter Server a<br />
datastore shared by the vCenter Server hosts and the single host.<br />
IMPORTANT If you rescan when a path is unavailable, the host removes the path from the list of paths to the<br />
device. The path reappears on the list as soon as it becomes available and starts working again.<br />
Perform <strong>Storage</strong> Rescan in the <strong>vSphere</strong> Client<br />
When you make changes in your SAN configuration, you might need to rescan your storage. You can rescan<br />
all storage available to your host. If the changes you make are isolated to storage accessed through a specific<br />
adapter, perform rescan for only this adapter.<br />
Use this procedure if you want to limit the rescan to storage available to a particular host or accessed through<br />
a particular adapter on the host. If you want to rescan storage available to all hosts managed by your vCenter<br />
Server system, you can do so by right-clicking a datacenter, cluster, or folder that contains the hosts and<br />
selecting Rescan for Datastores.<br />
Procedure<br />
1 In the <strong>vSphere</strong> Client, select a host and click the Configuration tab.<br />
Chapter 15 Managing <strong>Storage</strong> Devices<br />
<strong>VMware</strong>, Inc. 135