Netapp FAS2750 VEEAM backup performance with ISCSI

TKE — Fri, 31 Oct 2025 10:24:37 GMT

I am using a FAS2750 with a physical windows server (DL360Gen10) running veeam backup to a Vsphere cluster.
The connection from the veeam server to the FAS is in directsan mode (ISCSI). I am not using storage integration because i dont have enterprise plus veeam licenses.

The storage network is 10GBE, i am running the veeam backups to local SAS disks in the (physical) VEEAM server.
The network connection to the storage network is 2x 10GBE with multipathing enabled and active in the ISCSI configuration.
We also have on older Equallogic ps4210 SAN in place for archiving purposes.

The problem is, when a VM is running on the FAS2750, i am getting very slow single disk backup speeds (30MBps).
When multiple vm's are backed up at the same time the combined read speed of the FAS gets up to about 150MBps, but if a single vm with a large disk is backed up the speed is stuck at +-30MBps.

When i migrate the same VM to a datastore hosted on the Equallogic ps4210, the backup speed is up to 300MBps+.
Veeam bottleneck indication is 99% source if I backup from the datastore hosted on the FAS2750, when I backup the same vm from a datastore hosted on the equallogic the bottleneck idication of VEEAM is target.

Can there be a setting on the FAS2750 which is limiting my backup speed? Or how can I monitor on the FAS whats limiting my backup speed.

topic Netapp FAS2750 VEEAM backup performance with ISCSI in Data Protection

Netapp FAS2750 VEEAM backup performance with ISCSI