6.7

When you perform VMFS datastore management operations, such as creating a VMFS datastore or
RDM, adding an extent, and increasing or deleting a VMFS datastore, your host or the vCenter Server
automatically rescans and updates your storage. You can disable the automatic rescan feature by turning
off the Host Rescan Filter. See Turn Off Storage Filters.
In certain cases, you need to perform a manual rescan. You can rescan all storage available to your host
or to all hosts in a folder, cluster, and data center.
If the changes you make are isolated to storage connected through a specific adapter, perform a rescan
for this adapter.
Perform the manual rescan each time you make one of the following changes.
n
Zone a new disk array on a SAN.
n
Create new LUNs on a SAN.
n
Change the path masking on a host.
n
Reconnect a cable.
n
Change CHAP settings (iSCSI only).
n
Add or remove discovery or static addresses (iSCSI only).
n
Add a single host to the vCenter Server after you have edited or removed from the vCenter Server a
datastore shared by the vCenter Server hosts and the single host.
Important If you rescan when a path is unavailable, the host removes the path from the list of paths to
the device. The path reappears on the list as soon as it becomes available and starts working again.
Perform Storage Rescan
When you make changes in your SAN configuration, you might need to rescan your storage. You can
rescan all storage available to your host, cluster, or data center. If the changes you make are isolated to
storage accessed through a specific host, perform the rescan for only this host.
Procedure
1 In the vSphere Client object navigator, browse to a host, a cluster, a data center, or a folder that
contains hosts.
2 From the right-click menu, select Storage > Rescan Storage.
3 Specify extent of rescan.
Option Description
Scan for New Storage Devices Rescan all adapters to discover new storage devices. If new devices are
discovered, they appear in the device list.
Scan for New VMFS Volumes Rescan all storage devices to discover new datastores that have been added
since the last scan. Any new datastores appear in the datastore list.
vSphere Storage
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