Discussions specific to tape backups
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aich365
Service Provider
Posts: 51
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Joined: Aug 10, 2016 11:10 am
Full Name: Clive Harris
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Slow file backups to tape using SMB

Post by aich365 » Jul 26, 2018 12:25 pm

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.
Veeam Software
Posts: 8596
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Joined: Feb 04, 2013 2:07 pm
Full Name: Dmitry Popov
Location: Prague
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Re: Slow file backups to tape using SMB

Post by Dima P. » Jul 26, 2018 3:11 pm

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
Service Provider
Posts: 51
Liked: 1 time
Joined: Aug 10, 2016 11:10 am
Full Name: Clive Harris
Contact:

Re: Slow file backups to tape using SMB

Post by aich365 » Jul 26, 2018 3:20 pm 1 person likes this post

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.
Veeam Software
Posts: 8596
Liked: 634 times
Joined: Feb 04, 2013 2:07 pm
Full Name: Dmitry Popov
Location: Prague
Contact:

Re: Slow file backups to tape using SMB

Post by Dima P. » Jul 27, 2018 10:42 am

Clive,

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

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