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Veeam Backup & Replication 9.5
User Guide for VMware vSphere

Requirements and Limitations for Dell EMC VNX/VNXe

If you plan to perform backup and restore from Dell EMC VNX/VNXe storage snapshots, consider the following limitations:

Dell EMC VNX Block

  • Veeam Backup & Replication supports LUNs that reside on Storage Pools.
  • To take LUN snapshots, Veeam Backup & Replication uses the VNX snapshot technology. Make sure that you have a license that covers this technology. The SnapView snapshot technology is not supported.

Dell EMC VNX File

  • A read-only checkpoint can have only 1 writable snapshot. If a read-only checkpoint already has a writable snapshot, Veeam Backup & Replication uses this writable snapshot for restore.
  • Writable snapshots are not detected by the storage rescan process and are not displayed in the storage system hierarchy.


  • Veeam Backup & Replication does not support Dell EMC VNXe Gen 1 OS (2.x.x). Dell EMC VNXe Gen 2 OS (3.x.x) is supported.
  • In EMC VNXe, you cannot export more than 1 storage snapshot for a LUN or LUN group concurrently. For this reason, Veeam Backup & Replication can perform only one task that uses storage snapshots at the same time.

In Veeam Backup & Replication, tasks have the following priority levels (starting with the highest priority): restore task > backup job > rescan task. If you start several jobs or tasks that use storage snapshots, Veeam Backup & Replication will check what priority tasks have and perform the following actions:

  • If a LUN snapshot is exported for storage rescan and you start a backup job or restore task at the same time, the rescan process will fail.
  • If a LUN snapshot is exported for a backup job and you start another backup job at the same time, the second backup job will be waiting until the first backup job is finished.
  • If a LUN snapshot is exported for a restore task and you start a backup job at the same time, the backup job will fail (or failover to the regular processing mode if corresponding settings are enabled in the backup job).
  • If a LUN snapshot is exported for a backup job and you start a restore task at the same time, the restore task will be waiting until the backup job is finished.

Dell EMC VNX(e) Working over NFS

  • VMs that you plan to back up or replicate must not have VMware vSphere snapshots. VMs with VMware vSphere snapshots will be skipped from Backup from Storage Snapshots.
  • If you enable the Enable VMware tools quiescence option in the backup job settings, Veeam Backup & Replication will not use Backup from Storage Snapshots to process running Microsoft Windows VMs that have VMware Tools installed.
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