Slow file backups to tape using SMB

[aich365]

Case # 03105453

Tape jobs were running at 40MB/s instead of the usual 100+MB/s

SMB signing was turned on.
I have disabled this and jobs have resumed their normal speeds.
This signing could be set in 2 places - Group Policy or the registry
Group Policy (preferred method)
Computer Configuration, Policies, Windows Settings,Local Policies, Security Options,Microsoft network client: Digitally sign communications (if server agrees)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters
EnableSecuritySignature (1)
RequireSecuritySignature (0)

It can be viewed in Powershell by running
Get-SmbClientConfiguration
Look out for
EnableSecuritySignature : True
RequireSecuritySignature : False

As long as RequireSecuritySignature is set to false (0) then it is turned off.

[Dima P.]

Hello Clive.

Please keep working with our support team and let us know if you need any further assistance. Meanwhile, I'll ask QA team to review your case. Cheers!

[aich365]

Hi Dimitry

The service desk were very helpful but in the end it was tracked down by Synology.
I only pasted this info as an FYI in case someone has a similar problem.

Thanks

Clive

[Dima P.]

Clive,

Glad you nailed it and thank you for sharing the update. Cheers!