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Why So Slow !



 
 
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  #1  
Old October 20th 18, 05:58 PM posted to alt.windows7.general
Biller
external usenet poster
 
Posts: 3
Default 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  
Old October 20th 18, 07:51 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default 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  
Old October 20th 18, 11:12 PM posted to alt.windows7.general
Char Jackson
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Posts: 10,449
Default 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  
Old October 21st 18, 12:07 AM posted to alt.windows7.general
Biller
external usenet poster
 
Posts: 3
Default 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  
Old October 21st 18, 01:12 AM posted to alt.windows7.general
Bob_S[_3_]
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Posts: 33
Default 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  
Old October 21st 18, 09:33 PM posted to alt.windows7.general
Biller
external usenet poster
 
Posts: 3
Default 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  
Old October 21st 18, 09:54 PM posted to alt.windows7.general
Paul[_32_]
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Posts: 11,873
Default 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  
Old October 22nd 18, 04:25 AM posted to alt.windows7.general
Char Jackson
external usenet poster
 
Posts: 10,449
Default 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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