Overview of SMB Signing
- SMB (Server Message Block) protocol facilitates file sharing, print services, and remote administration over networks.
- SMB signing secures data by adding a digital signature to packets, preventing unauthorized tampering during transmission.
- SMB Signing is supported across all SMB protocol versions.
Performance Impact
Enabling SMB Signing can cause a significant performance drop due to the additional CPU workload required to digitally sign each packet. For example:
- Throughput can drop from 875 MiB/s to approximately 250 MiB/s during sequential read tests without multichannel support.
Mitigating Performance Issues
To reduce the performance degradation:
1. Deactivate SMB Signing on the D5000 Series
- Use the SMB Settings option in the D5000 series GUI to turn off Server Signing : NAS Share > Protocol > SMB > Settings
2. Deactivate SMB Signing on Clients
Procedures for disabling SMB Signing vary by operating system:
- Windows: Modify registry or Group Policy settings.
- Linux: Update
smb.confin Samba configuration. - Mac OS: Use terminal commands or modify SMB preferences.
Refer to reliable online resources or OS-specific documentation to find detailed steps for disabling SMB signing on client systems.
