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#1
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Why So Slow !
Win 7 Pro. Updated. USB3 flash pen drive with 20G of data to copy. Plugged into a USB3 (blue) port on Win 7 desktop. Coping to a 8T NAS on my home LAN. Plenty of space on the NAS. After One Day 11 Hours it says it still has 8 Hours left to complete copy. Win 7 PC is wifi connected on 5GHz channel. Router is AT&T wifi and internet connection 1Gbits. NAS is CAT5 to Router. Why so slow ? |
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#2
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Why So Slow !
Biller wrote:
Win 7 Pro. Updated. USB3 flash pen drive with 20G of data to copy. Plugged into a USB3 (blue) port on Win 7 desktop. Coping to a 8T NAS on my home LAN. Plenty of space on the NAS. After One Day 11 Hours it says it still has 8 Hours left to complete copy. Win 7 PC is wifi connected on 5GHz channel. Router is AT&T wifi and internet connection 1Gbits. NAS is CAT5 to Router. Why so slow ? Is the USB3 stick healthy ? What you're looking for, is areas of the USB3 stick with large downward spikes that almost touch the bottom of the chart. My USB3 setup on this machine is far, far, from optimal. But I still get a rate comparable to some of my crusty hard drives. I could likely get a better benchmark out of the other machine. But at least you can see it doesn't have any bad spots. I've lost two other USB3 sticks with TLC flash inside, so failure is definitely an option. https://i.postimg.cc/Hn0TVhsz/USB3-stick.gif You might be coming close to losing that USB3 stick (complete failure). Safety first. When they go, they will likely go the same day you start having trouble. ******* USB3 peripherals can emit broadly at 2.4GHz, smothering low band Wifi. However, you report your gear is running 5GHz, and that is unaffected. The broad peak at 2.4GHz is notched at 5GHz, so there's almost no noise there. The 5GHz Wifi isn't exactly at 5GHz, so you'd have to look up the numbers to see whether the Wifi sits in the notch. If you can get HDTune to scan the stick (doesn't always show up), that can help you decide what to do next. Considering the circumstances, you can run HDTune right now, while the transfer is still running, and get a good overall picture. That's because the USB3 stick isn't running even remotely close to the bus limit, so two things could easily read from it at the same time. If you were to let the transfer finish, then I'd want to run a checksum program on the source and destination file(s). Paul |
#3
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Why So Slow !
On Sat, 20 Oct 2018 09:58:06 -0700, Biller
wrote: Win 7 Pro. Updated. USB3 flash pen drive with 20G of data to copy. Plugged into a USB3 (blue) port on Win 7 desktop. Coping to a 8T NAS on my home LAN. Plenty of space on the NAS. After One Day 11 Hours it says it still has 8 Hours left to complete copy. Win 7 PC is wifi connected on 5GHz channel. Router is AT&T wifi and internet connection 1Gbits. NAS is CAT5 to Router. Why so slow ? The first step is to check the actual data transfer rate. You can get a basic idea by checking Task Manager, Networking tab, during the transfer. You need to know what you're dealing with as far as overall speed, as well as the shape of the transfer. Is it slow and steady, or does it stall and surge on an irregular basis? I'll assume that USB3 isn't the bottleneck and the data path through the Win7 PC itself isn't the bottleneck, so that leaves the WiFi connection, which we know very little about except that it's on the 5GHz band, and the router-NAS connection, which we also don't know much about. I'd start by temporarily replacing the WiFi connection with a cabled Ethernet connection to rule out WiFi issues such as interference, etc. (If you do that, what speed would that connection be? 100Mbps? 1000Mbps?) I'd also take a look at the router LAN ports, (what speed are they?), and the NAS network interface (what speed is that?)? If the NAS or the router only has 100Mbps capability, then that will be a limiting factor. Lastly, if you do everything and you're no farther along than you are now, try connecting the NAS directly to the PC. Whatever speed you get from a direct connection, that will show you what the max is. If it's still slow, you only have a few things to look at. -- Char Jackson |
#4
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Why So Slow !
FYI
Copy rate is 205 KBps for a 1.2G file. According to HDTune USB3 flash gives 110MBps I have two identical USB3 flash drives plugged in and bot have the same. This is while the copy is still running. I had a Cat5 able running from my WiFi router to the PC BUT when a MS update happned the CAT5 connection got cut off and cannot figure out how to get the ethernet card to see the Cat5 cable now so I am running a 5GHz USB dongle. Maybe to much USB3 going on ???? Process Explorer Network monitor says Two bands: one blue and one magenta. blue is 100KB average magenta is 75 KB average Both jump up and down considerably. CPU free is 90% Disk is nearly zero. No explanation as to what each band represents. |
#5
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Why So Slow !
"Biller" wrote in message news
Win 7 Pro. Updated. USB3 flash pen drive with 20G of data to copy. Plugged into a USB3 (blue) port on Win 7 desktop. Coping to a 8T NAS on my home LAN. Plenty of space on the NAS. After One Day 11 Hours it says it still has 8 Hours left to complete copy. Win 7 PC is wifi connected on 5GHz channel. Router is AT&T wifi and internet connection 1Gbits. NAS is CAT5 to Router. Why so slow ? One of the recent Win7 updates in the past couple of months killed Ethernet connections: https://www.askwoody.com/2018/ms-def...-bugs-in-win7/ https://www.askwoody.com/2018/patch-...he-b-patchers/ Solutions are on those links also. -- Bob S. |
#6
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More Data Points: Why So Slow !
USB drive transfers from itself to the Win & PC at approximately
Upload 5.64 MBytes/Sec. Download 119 MBytes/Sec The NAS is a Buffalo. I have two of them active on the LAN. Both I have tested. From the Win 7 PC via 5GHz WiFi. A LAN Speed Test shows approximately. Upload 0.20 MBytes/Sec Download 4.97 MBytes/Sec |
#7
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More Data Points: Why So Slow !
Biller wrote:
USB drive transfers from itself to the Win & PC at approximately Upload 5.64 MBytes/Sec. Download 119 MBytes/Sec The NAS is a Buffalo. I have two of them active on the LAN. Both I have tested. From the Win 7 PC via 5GHz WiFi. A LAN Speed Test shows approximately. Upload 0.20 MBytes/Sec Download 4.97 MBytes/Sec It's like it is going through a "routing step" or something. I've had routers here before, where the LAN to WAN speed is roughly 3MB/sec. Whereas the LAN to LAN speed goes through the learning switch portion and runs full speed. What's interesting about your result, is the up-to-down ratio seems to be 24x for each test case. For the USB3 stick, the ratio is a function of the asymmetry of cheap flash. The lowest grade USB3 flash on Newegg might give a typical 100MB/10MB read to write ratio. So that's to be expected. What's not expected, is a network transfer situation that exactly preserves the USB3 ratio. That doesn't make sense to me, that the ratios are a coincidence (the same ratio). The LAN speed test should have closer to a 1:1 ratio. (The protocol should be pipelined, with pipelined ACK. Only fragmentation could upset it, and the numbers still wouldn't be that bad.) I had a fragmented non-pipelined networking situation before, where the transfer rate was 5KB/sec (over broadband!), but the distance played a part. It was the way it was routed through the network, plus the lack of pipelining, that gave 5KB/sec. In your case, even if something terrible happened from a protocol point of view, the time of flight is short. Paul |
#8
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More Data Points: Why So Slow !
On Sun, 21 Oct 2018 13:33:52 -0700, Biller
wrote: USB drive transfers from itself to the Win & PC at approximately Upload 5.64 MBytes/Sec. Download 119 MBytes/Sec That doesn't look like the bottleneck to me. The NAS is a Buffalo. I have two of them active on the LAN. Buffalo is a manufacturer, or brand name, and doesn't say much about how it's connected and what network speeds it supports. I think I'd skip right to the end of the tests and simply connect one of the NAS devices directly to the Win 7 PC. If the transfer speed is what you were hoping for, the issue is most likely the WiFi connection. In fact, I suspect the WiFi connection even before doing that simple test. Both I have tested. From the Win 7 PC via 5GHz WiFi. A LAN Speed Test shows approximately. Upload 0.20 MBytes/Sec Download 4.97 MBytes/Sec WiFi is at the top of my list of causes of slow and erratic speed, especially in your case. Bypass it and see what happens. -- Char Jackson |
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