Rescan (Storage Discovery) Process

The Storage Discovery process performs rescan of the whole storage system or selected volumes. It can be performed against the following nodes in the storage system hierarchy:

  • Vendor
  • Storage system
  • Storage volume

In case you have limited rescan scope, storage discovery will be performed only for the specified volumes. For details, see Limiting Rescan Scope.


If only Veeam Agents or NAS backup processing is selected for a storage system, storage volumes are not displayed and rescan of the specified volumes is not available.

Stages of Rescan

  1. [For NAS, Veeam Agent integration] General infrastructure

Receiving storage system information.

  1. Defining the storage system data hierarchy (volumes, shares, LUNs, snapshots).
  2. Getting the information about each volume added to rescan scope (name, ID, size, SCSI Unique ID for LUNs, local paths for shares).
  3. Defining basic information about storage snapshots (name, id, creation time).
  4. Getting information about storage adapters (targets).
  5. Receiving other relevant information.
  1. [For NAS, Veeam Agent integration] Availability from backup proxies

Verifying the possibility of using proxies for backup/rescan/data transmission directly from the storage systems.

  1. Analyzing the selected proxies and checking iSCSI/NFS/CIFS servers availability from these proxies.
  2. Matching proxies with available servers. The LUNs/share files available from these servers are considered available from the relevant proxies.

Availability through Fibre Channel is not checked. If a proxy is added to a storage system list, the access is considered set. 

How to Start Storage Discovery

The following actions and processes initiate the Storage Discovery process:

The Storage Monitor process runs in the background. Every 10 minutes the process checks:

If changes are detected, the Storage Monitor initiates the rescan of the container entity, including all rescan stages except VMFS/NFS rescan:

If more than 30% of the volumes need to be rescanned, the Storage Monitor starts rescan of the whole storage system.

Rescan of all storage systems, including all rescan stages except VMFS/NFS rescan, starts once a week.

Rescan of all storage systems without vCenter/ESXi and VMFS/NFS Rescan.

Rescan of all storage systems.

Rescan of storage systems with NAS integration.

Rescan of the added storage system, all stages except VMFS/NFS rescan.

If necessary, you can start the Storage Discovery process manually. Storage discovery can be performed against the following nodes in the storage system hierarchy: vendor, storage system or storage volume.

To manually start storage discovery:

  1. Open the Storage Infrastructure view.
  2. In the inventory pane, expand the storage system tree.
  3. Select a node in the storage system hierarchy: vendor, storage system or volume.
  4. Click Rescan on the ribbon or right-click the node in the hierarchy and select Rescan storage or Rescan volume.


The rescan operation is performed only for volumes included in the rescan scope. For information how to change the rescan scope, see Limiting Rescan Scope.

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