Poor Transfer Speeds with SABRENT NT-SS5G and DS1019+

[BlackReaper66613]

Description of the problem

I am able to reading at about 350 MBs but my write speed is about 90MBs

Description of your products

• DS1019+
  • Linux SYNDATA 4.4.180+ #42962
  • DSM 7.1.1-42962 Update 1
• SABRENT NT-SS5G

Description of your environment

• Connected to 10G Switch
  • CRS305-1G-4S+IN
• cable category CAT6A

Output of dmesg command

redacted too long

Output of lsusb command

|__usb1 1d6b:0002:0404 09 2.00 480MBit/s 0mA 1IF (Linux 4.4.180+ xhci-hcd xHCI Host Controller 0000:00:15.0) hub
|__1-4 f400:f400:0100 00 2.00 480MBit/s 200mA 1IF (Synology DiskStation 7F0092A994CA6054)
|__usb2 1d6b:0003:0404 09 3.00 5000MBit/s 0mA 1IF (Linux 4.4.180+ xhci-hcd xHCI Host Controller 0000:00:15.0) hub
|__2-2 2eca:c101:0101 00 3.20 5000MBit/s 896mA 1IF (Aquantia Sabrent 5G Ethernet Adapter 00000019))

Output of ifconfig -a command

bond0 Link encap:Ethernet HWaddr 00:11:32:9B:25:B5
inet addr:192.168.40.40 Bcast:192.168.40.255 Mask:255.255.255.0
inet6 addr: fe80::211:32ff:fe9b:25b5/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:9000 Metric:1
RX packets:3339 errors:0 dropped:0 overruns:0 frame:0
TX packets:5259 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:358367 (349.9 KiB) TX bytes:3436818 (3.2 MiB)

eth0 Link encap:Ethernet HWaddr 00:11:32:9B:25:B5
UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
RX packets:300085 errors:0 dropped:0 overruns:0 frame:0
TX packets:61657 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:445684691 (425.0 MiB) TX bytes:6942665 (6.6 MiB)
Interrupt:125

eth1 Link encap:Ethernet HWaddr 00:11:32:9B:25:B5
UP BROADCAST RUNNING SLAVE MULTICAST MTU:9000 Metric:1
RX packets:3424 errors:0 dropped:0 overruns:0 frame:0
TX packets:9433 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:412997 (403.3 KiB) TX bytes:6725719 (6.4 MiB)
Interrupt:126 base 0x6000

eth2 Link encap:Ethernet HWaddr 00:24:27:88:45:03
UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
RX packets:11896 errors:0 dropped:0 overruns:0 frame:0
TX packets:2240 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1129022 (1.0 MiB) TX bytes:367368 (358.7 KiB)

eth2.40 Link encap:Ethernet HWaddr 00:24:27:88:45:03
inet addr:192.168.40.45 Bcast:192.168.40.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
RX packets:2632 errors:0 dropped:0 overruns:0 frame:0
TX packets:2204 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:588104 (574.3 KiB) TX bytes:334401 (326.5 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:158 errors:0 dropped:0 overruns:0 frame:0
TX packets:158 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:23268 (22.7 KiB) TX bytes:23268 (22.7 KiB)

sit0 Link encap:IPv6-in-IPv4
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

[bb-qq]

Did you check the Troubleshooting page?

[sparkplug37]

I, too, have noticed slow speeds using this interface. To test things I have run iperf3, which shows the expected speeds, but using an smb file copy its very slow at 10MB/sec. So in my experiments, I have discovered disabling the Synology smb service and re-enabling it gives back the smb speeds I had expected of approx 150MB/sec

[bb-qq]

I don't know if this is related to your problem, but if the MTU values are not set properly at the source and destination, the performance may not be sufficient. You may also want to try setting the SMB protocol version to 3.