Question Very slow file transfer speeds over home Ethernet network

[randy5419]

I recently added an NAS to my Ethernet network and have been very disappointed with how long it takes to copy files from my PC to the NAS. All the components of my network supposedly support 1GB/sec transfer speeds, but I am getting only about 1MB/sec transfer speeds.

I’m wondering if I correctly set up my network and would appreciate feedback. My PC, my NAS, and my newly updated Verizon router connect directly to a D-LINK DGS-1024D 24-port switch (Unmanaged Gigabit Ethernet Switch), which supports 1GB speed and is about 12 years old. The switch definitely slows down the transfer speeds. I temporarily connected both my computer and my NAS directly to the Verizon router, and the transfer speed between PC and NAS increased to about 95MB/sec, a 95-fold increase in speed but still not 1GB speed.

My ethernet wires and connectors are CAT6.

Should I get a new switch? Thanks.

 

[ex_bubblehead]

Your transfers will only proceed at the speed of the slowest link in the chain, usually the storage (drive).

 

[USAFRet]

the transfer speed between PC and NAS increased to about 95MB/sec,

That is just about right for that type of transfer.

 

[randy5419]

I apologize for not asking a more precise question. The question is: Given the facts I have given in my initial post, am I correct to conclude that the switch is not performing as it should, or is it normal that putting a switch in the loop slows transfers speeds to the degree that I report?

 

[USAFRet]

I apologize for not asking a more precise question. The question is: Given the facts I have given in my initial post, am I correct to conclude that the switch is not performing as it should, or is it normal that putting a switch in the loop slows transfers speeds to the degree that I report?

A properly functioning gigabit switch does not reduce speeds in a regular gigabit LAN.

Between my PC and my NAS, there are 3x gigabit switches and the router.
Performance is exactly the same as if both the PC and NAS were connected directly to the router.

I suspect your issue lies elsewhere.
I'd look at the cables first.

 

[cruisetung]

As suggested, a gigabit switch shouldn't slow down your network, at all.

You probably create a network loop when connecting to the switch incorrectly and cause a network storm and then slow down the traffic.

https://kb.netgear.com/000060475/What-is-a-network-loop

Or it could be cable problem suggested by @USAFRet

 

[randy5419]

A properly functioning gigabit switch does not reduce speeds in a regular gigabit LAN.

Between my PC and my NAS, there are 3x gigabit switches and the router.
Performance is exactly the same as if both the PC and NAS were connected directly to the router.

I suspect your issue lies elsewhere.
I'd look at the cables first.

I suspect your issue lies elsewhere.
I'd look at the cables first.

You are correct. In the process of testing if the cables are to blame, I am embarrassed to admit that I found that the original network configuration works fine this evening. I do not know why earlier in the week I experienced such low transfer speeds with the original network configuration. Is it possible that an imperfect plug-in to the switch would result in low speed rather that no connection? Seems improbable. My guess is that the low speeds were due to a temporary problem with my network. Sorry to have troubled you all.

 

[BFG-9000]

All the components of my network supposedly support 1GB/sec transfer speeds
a D-LINK DGS-1024D 24-port switch (Unmanaged Gigabit Ethernet Switch), which supports 1GB speed

D-LINK DGS-1024D is a gigabit switch and thus not capable of 1GB/sec transfer speeds, only 1Gb/sec transfer speeds which is 125MB/s before overhead.

If you want 1GB/sec you need a 10Gbe switch, NIC and NAS. The Cat6 wire is good to 55 meters at 10Gbe if it actually meets that specification and isn't fake.

 

[randy5419]

D-LINK DGS-1024D is a gigabit switch and thus not capable of 1GB/sec transfer speeds, only 1Gb/sec transfer speeds which is 125MB/s before overhead.

If you want 1GB/sec you need a 10Gbe switch, NIC and NAS. The Cat6 wire is good to 55 meters at 10Gbe if it actually meets that specification and isn't fake.

Thank you for pointing out that my switch speed (and that of other network components) is measured in bits rather than bytes. I was not aware.

 

[ex_bubblehead]

Thank you for pointing out that my switch speed (and that of other network components) is measured in bits rather than bytes. I was not aware.

For future reference:

b=bits
B=bytes

They are not interchangable.