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Windows 7: Why is copying data between my 2 computers VERY slow?

13 Jan 2010   #51
RedBirdDad

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

Quote   Quote: Originally Posted by shiphen View Post
Wait a minute - it has suddenly sped up. "3.2GBytes" (!!)
Well that is MUCH better - although still hardly 10GB, but never mind.

Okay now it's gone 2AM here in the UK I *MUST* get some sleep now.
But MANY thanks so much for all your help good people...
G'night

Ship

Cool Beans! Get a good nights sleep!

BTW: You won't get 10GB speed. That's 80Mbps and the Windows file copy can't push data that fast.


My System SpecsSystem Spec
.
13 Jan 2010   #52
pparks1

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by RedBirdDad View Post
BTW: You won't get 10GB speed. That's 80Mbps and the Windows file copy can't push data that fast.
Boy, now we are all getting our bits and bytes and M's and G's all scrambled up

10GB does not equate to 80Mbps. I think you were trying to say 10 megabytes per second would be 80 megabits per second.

Technically speaking, Windows file copy can handle that just fine.

On average
10 megabits per second = 1,250,000 bytes per second. Or about 1.2 megabytes a second

100 megabits per second = 12,500,000 bytes per second. Or around 12 megabytes per second

1000 megabits per second = 125,000,000 bytes per second. Or around 125 megabytes per second

Also, on average, Ethernet is only about 80% efficient. So, if you take 12 megabytes per second times .80 = ~10 megabytes per second that I quoted before.


The problem with moving to a gigabit network, is that most home users don't have hard drives which can transfer over 100MB/s and sustain that rate. And even if they have one machine with an SSD or a RAID array, they probably don't have a second computer which could keep up with it. Hence the reason that most home users cannot max out a gigabit connection. So, generally on a good home network with gigabit...you typically see max transfers around 60-70 megabytes per second. That's about all you are ever going to see.
My System SpecsSystem Spec
13 Jan 2010   #53
RedBirdDad

W7 Ultimate 64bit W7 Premium 64bit W7 Premium 32bit WXP Home 32bit
 
 

Yeah, looked at what I typed and saw the "GB".

I've never seen windows file copy come *close* to 80Mbps. Not even iperf tests came any where near that unless the two machines were real screamers.

Your post was spot on though.
My System SpecsSystem Spec
.

14 Jan 2010   #54
surfasb

Windows 7
 
 

Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by RedBirdDad View Post
BTW: You won't get 10GB speed. That's 80Mbps and the Windows file copy can't push data that fast.
Boy, now we are all getting our bits and bytes and M's and G's all scrambled up

10GB does not equate to 80Mbps. I think you were trying to say 10 megabytes per second would be 80 megabits per second.

Technically speaking, Windows file copy can handle that just fine.

On average
10 megabits per second = 1,250,000 bytes per second. Or about 1.2 megabytes a second

100 megabytes[sic] per second = 12,500,000 bytes per second. Or around 12 megabytes per second

1000 megabytes[sic] per second = 125,000,000 bytes per second. Or around 125 megabytes per second

Also, on average, Ethernet is only about 80% efficient. So, if you take 12 megabytes per second times .80 = ~10 megabytes per second that I quoted before.


The problem with moving to a gigabit network, is that most home users don't have hard drives which can transfer over 100MB/s and sustain that rate. And even if they have one machine with an SSD or a RAID array, they probably don't have a second computer which could keep up with it. Hence the reason that most home users cannot max out a gigabit connection. So, generally on a good home network with gigabit...you typically see max transfers around 60-70 megabytes per second. That's about all you are ever going to see.
Even this guy can't even get it right. LOL. We should just stop trying to correct each other.....
My System SpecsSystem Spec
14 Jan 2010   #55
Zidane24

Windows 7 Home Premium x64 - Mac OS X 10.6.4 x64
 
 

Quote   Quote: Originally Posted by surfasb View Post
Quote   Quote: Originally Posted by pparks1 View Post
Quote   Quote: Originally Posted by RedBirdDad View Post
BTW: You won't get 10GB speed. That's 80Mbps and the Windows file copy can't push data that fast.
Boy, now we are all getting our bits and bytes and M's and G's all scrambled up

10GB does not equate to 80Mbps. I think you were trying to say 10 megabytes per second would be 80 megabits per second.

Technically speaking, Windows file copy can handle that just fine.

On average
10 megabits per second = 1,250,000 bytes per second. Or about 1.2 megabytes a second

100 megabytes[sic] per second = 12,500,000 bytes per second. Or around 12 megabytes per second

1000 megabytes[sic] per second = 125,000,000 bytes per second. Or around 125 megabytes per second

Also, on average, Ethernet is only about 80% efficient. So, if you take 12 megabytes per second times .80 = ~10 megabytes per second that I quoted before.


The problem with moving to a gigabit network, is that most home users don't have hard drives which can transfer over 100MB/s and sustain that rate. And even if they have one machine with an SSD or a RAID array, they probably don't have a second computer which could keep up with it. Hence the reason that most home users cannot max out a gigabit connection. So, generally on a good home network with gigabit...you typically see max transfers around 60-70 megabytes per second. That's about all you are ever going to see.
Even this guy can't even get it right. LOL. We should just stop trying to correct each other.....
Seeing as you have made a comment to suggest this...can you post why you feel pparks comment is incorrect and also post the correct method in the process?
My System SpecsSystem Spec
14 Jan 2010   #56
acurasd

Windows 7 Ultimate x64
 
 

Uh oh... do i see a sarah palin and hilary clinton debate?
My System SpecsSystem Spec
14 Jan 2010   #57
Zidane24

Windows 7 Home Premium x64 - Mac OS X 10.6.4 x64
 
 

Quote   Quote: Originally Posted by acurasd View Post
Uh oh... do i see a sarah palin and hilary clinton debate?
I fail to see the comparison...

I think that if someone provides information about a subject and that information may be incorrect (as suspected by another user). The user belaying suspicion should at least provide the correct information to rectify the misconception
My System SpecsSystem Spec
14 Jan 2010   #58
acurasd

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Zidane24 View Post
Quote   Quote: Originally Posted by acurasd View Post
Uh oh... do i see a sarah palin and hilary clinton debate?
I fail to see the comparison...

I think that if someone provides information about a subject and that information may be incorrect (as suspected by another user). The user belaying suspicion should at least provide the correct information to rectify the misconception

Nawww I see what you mean man.....

If your going to stick your foot in your mouth; make sure you got something to back it up with.
My System SpecsSystem Spec
14 Jan 2010   #59
zzz2496

Windows7 Ultimate 64bit
 
 

I wonder what kind of files did the thread starter copy... if he (assuming the thread starter = male) copied lots of small files (~4kB to 100kB each), then it's not the network connection that is chugging... it's his drive that's chugging... Mechanical disks can't seek fast enough to maintain high enough random read speed on tiny files that are scattered all over the disk. Some SSD can cope with such workload, but majority of them (for now) is almost as slow...

zzz2496
My System SpecsSystem Spec
14 Jan 2010   #60
pparks1

Windows 7 Ultimate x64
 
 

The poster did indicate the problem with my post. In my example section, I said 10 megabits...but then followed up with 100 megabytes and 1000 megabytes. He wrote [sic] next to the sections which were incorrect. I have since corrected my post so that it is accurate. We all make mistakes from time to time and I'd rather be told about mine so that I can fix them then just let them slide....so thanks to surfasb

I too would be interested to see if this problem gets corrected or what types of files they were. It's always disappointing to see somebody running at a slower speed than they should. At least the OP knows it's not right, I feel bad about those who just assume all is fine.
My System SpecsSystem Spec
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 Why is copying data between my 2 computers VERY slow?




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