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Addressing slow or corrupt SMB file transfers requires optimization and maintenance.

Addressing slow or corrupt SMB file transfers requires optimization and maintenance.

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07GmanBEAST07
Member
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213
02-21-2016, 09:18 AM
#1
Hello everyone. Today I’m checking the reasons behind the slow SMB file transfers—current speeds hover around 13MB/s to 17MB/s. While it works for some, my network supports faster transfers. Encryption seems to be a major factor, though it impacts performance. I experimented with disabling encryption via Group Policy, but results didn’t improve. I also tried Microsoft tools like regedit, but they didn’t help much. Good news: thanks to @nico282, a PowerShell command boosted speeds significantly to 79MB/s–92MB/s. Restarting the computer might be necessary. If you have another approach to try, I’d appreciate it. I’m using SMB2/3 protocol.
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0
07GmanBEAST07
02-21-2016, 09:18 AM #1

Hello everyone. Today I’m checking the reasons behind the slow SMB file transfers—current speeds hover around 13MB/s to 17MB/s. While it works for some, my network supports faster transfers. Encryption seems to be a major factor, though it impacts performance. I experimented with disabling encryption via Group Policy, but results didn’t improve. I also tried Microsoft tools like regedit, but they didn’t help much. Good news: thanks to @nico282, a PowerShell command boosted speeds significantly to 79MB/s–92MB/s. Restarting the computer might be necessary. If you have another approach to try, I’d appreciate it. I’m using SMB2/3 protocol.

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SunwardHeron
Junior Member
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45
02-21-2016, 11:05 AM
#2
It seems you've reached a speed of 93mbytes/s, which equals over 900 mbits/s. The top limit for a 1 gbit network is around that. Unless you have 10 Gigabit NICs and cables to every device—excluding the router—you won't be able to go any faster.
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SunwardHeron
02-21-2016, 11:05 AM #2

It seems you've reached a speed of 93mbytes/s, which equals over 900 mbits/s. The top limit for a 1 gbit network is around that. Unless you have 10 Gigabit NICs and cables to every device—excluding the router—you won't be able to go any faster.

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housten15
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51
02-21-2016, 12:28 PM
#3
Thanks for the feedback. As mentioned in the title, turning off signature requests isn't ideal. I think a better approach would be to focus on improving overall transfer speed instead. That said, it still works.
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housten15
02-21-2016, 12:28 PM #3

Thanks for the feedback. As mentioned in the title, turning off signature requests isn't ideal. I think a better approach would be to focus on improving overall transfer speed instead. That said, it still works.

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byFreek
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62
03-13-2016, 06:05 PM
#4
I've never encountered such slow performance when using default signing between two Windows systems (Windows Server and Windows 10/11). Are you running a NAS or a different operating system on the other side? Microsoft takes advantage of the AES-NI instructions in modern CPUs, which handles the encryption efficiently. In fact, BitLocker uses AES-NI for disk encryption and can achieve around 7GB/s for reads and writes. If this speed is low, it might indicate an issue or poor implementation of encryption.
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byFreek
03-13-2016, 06:05 PM #4

I've never encountered such slow performance when using default signing between two Windows systems (Windows Server and Windows 10/11). Are you running a NAS or a different operating system on the other side? Microsoft takes advantage of the AES-NI instructions in modern CPUs, which handles the encryption efficiently. In fact, BitLocker uses AES-NI for disk encryption and can achieve around 7GB/s for reads and writes. If this speed is low, it might indicate an issue or poor implementation of encryption.

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Fantatrol_HD
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64
03-18-2016, 03:29 PM
#5
SMB 3.0 added AES-CMAC functionality. Windows Server 2022 and Windows 11 brought AES-128-GMAC signing faster. For details on AES-128-GMAC signing, refer to the related documentation. AES-CMAC and AES-CCM boost encryption speed on modern CPUs with AES support.
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Fantatrol_HD
03-18-2016, 03:29 PM #5

SMB 3.0 added AES-CMAC functionality. Windows Server 2022 and Windows 11 brought AES-128-GMAC signing faster. For details on AES-128-GMAC signing, refer to the related documentation. AES-CMAC and AES-CCM boost encryption speed on modern CPUs with AES support.

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LooseDawg
Senior Member
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628
03-18-2016, 04:05 PM
#6
I've included the USB SSD drive with the router. It has a USB3.0 port (TP-Link BE550). The speeds I'm experiencing are quite slow without using PowerShell commands. I haven't tried file transfers via SMB between computers yet, so I don't have any details on that.
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LooseDawg
03-18-2016, 04:05 PM #6

I've included the USB SSD drive with the router. It has a USB3.0 port (TP-Link BE550). The speeds I'm experiencing are quite slow without using PowerShell commands. I haven't tried file transfers via SMB between computers yet, so I don't have any details on that.

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