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    LAN speed

    Scheduled Pinned Locked Moved IT Discussion
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    • IT-ADMINI
      IT-ADMIN
      last edited by

      so what do you think guys ?? should i change it to 1000 ??

      scottalanmillerS 1 Reply Last reply Reply Quote 0
      • DustinB3403D
        DustinB3403 @Dashrender
        last edited by

        @Dashrender It's never a best practice, but to pinpoint causes of trouble sometimes you must.

        @IT-ADMIN can you confirm that you can access the NAS with the second port or a cross-over cable. We don't want you to have to perform a factory reset unnecessarily.

        scottalanmillerS 1 Reply Last reply Reply Quote 0
        • IT-ADMINI
          IT-ADMIN
          last edited by

          did the factory reset delete the data ?? or just reset the setting ??

          1 Reply Last reply Reply Quote 0
          • DustinB3403D
            DustinB3403
            last edited by

            That generally will delete everything, including the RAID configuration.

            Hence, "Factory Reset".

            1 Reply Last reply Reply Quote 1
            • scottalanmillerS
              scottalanmiller @coliver
              last edited by

              @coliver said:

              Oh man... it looks like Solid blue indicates the port is running at 10Mb/s (If I'm reading the right documentation) if the duplex LED is also blue then you are running at half duplex.

              Can't be, he's getting faster than that now.

              5.5MB/s is 44Mb/s.

              1 Reply Last reply Reply Quote 0
              • scottalanmillerS
                scottalanmiller @IT-ADMIN
                last edited by

                @IT-ADMIN said:

                @DustinB3403 said:

                Can you go into the network page on the NAS, and screen shot that for us?

                I have a feeling the speed within the NAS is set to Auto. Which if it is, is likely causing the performance of the NIC to be slow. So either there is something wrong with the configuration on your Switch. Or the NAS.

                yes you are right, the link speed is set to auto, should i change it to 1000 ??

                No, it is working perfectly now. GigE requires Auto. Setting it to 1000 is an unofficial mode only supported by a few vendors who don't follow the specs.

                DashrenderD 1 Reply Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @IT-ADMIN
                  last edited by

                  @IT-ADMIN said:

                  so what do you think guys ?? should i change it to 1000 ??

                  No, the network is clearly not an issue here. What started us even looking at that? The speed that you are getting is clearly not being capped by an Ethernet speed detection. This cannot be where your issue is.

                  1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @DustinB3403
                    last edited by

                    @DustinB3403 said:

                    @Dashrender It's never a best practice, but to pinpoint causes of trouble sometimes you must.

                    We've eliminated that as a possible concern already.

                    1 Reply Last reply Reply Quote 0
                    • scottalanmillerS
                      scottalanmiller
                      last edited by

                      Okay, moving on from the NIC which is a red herring, let's talk about where the issues CAN be....

                      They could be...

                      • That the NAS cannot go faster than this. NICs do not determine the speed that can be achieved, the device does. What is the setup of the device, the protocols, the actions that are being measured at 5.5MB/s (aka 44Mb/s.)
                      • The network is saturated causing it to slow down to this speed. The NIC we know for certain is much faster than the speed that you are getting in the transfer. So if the network is the issue, it is from a bottleneck along the path. This is extremely unlikely as LAN bottlenecks in the switched networking world for SMBs pretty much don't exist until you start adding VLANs and getting silly.
                      • The device receiving the files cannot receive them any faster than this. The bottleneck can be either end.
                      1 Reply Last reply Reply Quote 0
                      • IT-ADMINI
                        IT-ADMIN
                        last edited by

                        ok, i think i will keep it as it is "auto"

                        1 Reply Last reply Reply Quote 0
                        • scottalanmillerS
                          scottalanmiller
                          last edited by

                          So we need to figure out if the speed issue exists from the sending point, the receiving point or along the path.

                          1 Reply Last reply Reply Quote 0
                          • scottalanmillerS
                            scottalanmiller
                            last edited by

                            You would not expect to be getting 1Gb/s in any way from even a perfect NAS able to stream from memory. With Ethernet, TCP/IP and iSCSI overhead alone you'd normally max out around 800Mb/s and with NFS or SMB a little lower than that. That's if perfect.

                            Typically storage is measured in IOPS, not in through (bandwidth) because this is what matters nearly all of the time. Throughput does matter, but isn't what generally impacts us. You almost never see storage requirements written in anything but IOPS. This is because of how storage happens... the delays and performance issues almost always come from an inability to "do different things" rather than to stream data on or off. If you plan to use this as a streaming media server, that could be different, but for normal use, throughput isn't a real concern.

                            1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller
                              last edited by

                              In order to measure throughput in any real way you need a single, extremely large file that will transfer for twenty minutes or so and a receiving unit that has "unlimited" ability to accept the file (preferably into memory, not disk) and a network that you know has no saturation (this could be a quiet switch, a switch with nothing but this connection or a crossover cable.) Eliminate the "noise" and things that cause interruptions so that you can, as clearly as possible, look only at the throughput.

                              1 Reply Last reply Reply Quote 0
                              • DashrenderD
                                Dashrender
                                last edited by

                                Scott - what tool would you use to create a 120 GB file to keep a 1 Gb link saturated for 20 mins (assuming 800 Mb/s transfer)?

                                scottalanmillerS 1 Reply Last reply Reply Quote 0
                                • DashrenderD
                                  Dashrender @scottalanmiller
                                  last edited by

                                  @scottalanmiller said:

                                  @IT-ADMIN said:

                                  @DustinB3403 said:

                                  Can you go into the network page on the NAS, and screen shot that for us?

                                  I have a feeling the speed within the NAS is set to Auto. Which if it is, is likely causing the performance of the NIC to be slow. So either there is something wrong with the configuration on your Switch. Or the NAS.

                                  yes you are right, the link speed is set to auto, should i change it to 1000 ??

                                  No, it is working perfectly now. GigE requires Auto. Setting it to 1000 is an unofficial mode only supported by a few vendors who don't follow the specs.

                                  Now that you say that - I do recall something about Auto being the standard - Is that in an RFC?

                                  scottalanmillerS 1 Reply Last reply Reply Quote 0
                                  • IT-ADMINI
                                    IT-ADMIN
                                    last edited by

                                    now the speed is 24.2 MB/s 😲

                                    0_1451316323916_Untitled.png

                                    scottalanmillerS 2 Replies Last reply Reply Quote 1
                                    • DashrenderD
                                      Dashrender
                                      last edited by

                                      Well you're at 201 Mb/s now - what protocol are you using? SMB 2.0/3.0?

                                      IT-ADMINI 1 Reply Last reply Reply Quote 1
                                      • IT-ADMINI
                                        IT-ADMIN @Dashrender
                                        last edited by

                                        @Dashrender said:

                                        Well you're at 201 Mb/s now - what protocol are you using? SMB 2.0/3.0?

                                        SMB 2.0

                                        scottalanmillerS 1 Reply Last reply Reply Quote 0
                                        • IT-ADMINI
                                          IT-ADMIN
                                          last edited by

                                          maybe if i change it to SMB 3.0 i will get more speed

                                          scottalanmillerS 1 Reply Last reply Reply Quote 0
                                          • IT-ADMINI
                                            IT-ADMIN
                                            last edited by

                                            ???

                                            1 Reply Last reply Reply Quote 0
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