Different network speed on shares, same NAS, ReadyNas 104

[heideroffset]

We have a ReadyNas 104 with multiple shares. All shares have the exact same settings. Some of the share folders are extremely slow, some work fine. I have confirmed this with NASTester - some shares are way slower than others. All folders have the exact same settings and are on the same NAS/Drive. What is happening?

Running warmup...
Running a 100MB file write on \\PIWI-1\JobDaten 5 times...
Iteration 1: 6,33 MB/sec
Iteration 2: 6,01 MB/sec
Iteration 3: 6,49 MB/sec
Iteration 4: 6,25 MB/sec
Iteration 5: 6,41 MB/sec
-----------------------------
Average (W): 6,30 MB/sec
-----------------------------
Running a 100MB file read on \\PIWI-1\JobDaten 5 times...
Iteration 1: 8,69 MB/sec
Iteration 2: 9,15 MB/sec
Iteration 3: 9,25 MB/sec
Iteration 4: 9,20 MB/sec
Iteration 5: 8,75 MB/sec
-----------------------------
Average (R): 9,01 MB/sec
-----------------------------

Running warmup...
Running a 100MB file write on \\PIWI-1\JobArchiv 5 times...
Iteration 1: 30,88 MB/sec
Iteration 2: 27,56 MB/sec
Iteration 3: 21,07 MB/sec
Iteration 4: 23,68 MB/sec
Iteration 5: 24,09 MB/sec
-----------------------------
Average (W): 25,46 MB/sec
-----------------------------
Running a 100MB file read on \\PIWI-1\JobArchiv 5 times...
Iteration 1: 46,48 MB/sec
Iteration 2: 37,84 MB/sec
Iteration 3: 38,68 MB/sec
Iteration 4: 46,16 MB/sec
Iteration 5: 42,67 MB/sec
-----------------------------
Average (R): 42,36 MB/sec
-----------------------------

[heideroffset]

Strangely, if I run the same test on its IP \\192.168.0.128 it's way faster than over the local name \\PIWI-1

Running warmup...
Running a 100MB file write on \\192.168.0.128\JobDaten once...
-----------------------------
Average (W): 37,40 MB/sec
-----------------------------
Running a 100MB file read on \\192.168.0.128\JobDaten once...
-----------------------------
Average (R): 46,70 MB/sec
-----------------------------

[StephenB]

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@heideroffset wrote:

Strangely, if I run the same test on its IP \\192.168.0.128 it's way faster than over the local name \\PIWI-1

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Do you have ipv6 enabled on the NAS?  If you do, try disabling it.  

[heideroffset]

ipv6 and strict sync are disabled on all shares

[StephenB]

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@heideroffset wrote:

ipv6 and strict sync are disabled on all shares

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a bit confused on the first bit, since ipv6 is not a per-share setting.

What firmware are you running?

Is the PC connected with ethernet or wifi?

Also, I am wondering what results you get with strict sync enabled.