Bug
When connecting to a Server Message Block (SMB) 3.0 directory on the Dell EMC Isilon network-attached storage (NAS) and leveraging SMB Multichannel from ArcGIS Pro, the reading and writing performance is negatively impacted.
| Bug ID Number | BUG-000128763 |
|---|---|
| Submitted | February 18, 2020 |
| Last Modified | June 25, 2025 |
| Applies to | ArcGIS Pro |
| Version found | 2.5 |
| Operating System | Windows OS |
| Operating System Version | 10.0 64 Bit |
| Status | Will Not Be Addressed |
Additional Information
We apologize that we were unable to address this issue within the current product support cycle. If the issue continues to affect your work in a supported release, please contact Technical Support.Workaround
There is only one known workaround that does not require modification of the NAS appliance itself, but the success probability is inconsistent. Instead of utilizing Universal Naming Convention (UNC) paths to access directories on a Dell EMC Isilon NAS with Server Message Block (SMB) 3.0 enabled, map those paths to letter drives and realize normal read or write performance.
If this does not resolve the problem, the only other known workaround as of 2022 is to disable SMB Multichannel on the Isilon appliance, as this performance behavior has been isolated to that capability being enabled.
Steps to Reproduce
Bug ID: BUG-000128763
Software:
- ArcGIS Pro
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