Gigabit NIC

zio_mangrovia · 01-29-2009, 12:43 PM

I have two kind of Bell laptops with both Gigabit NIC which are linked to AT-GS924 (unmanaged switch with 24 ports in Gigabit).
I copied a file of 1 GByte from laptop A to laptop B it twice or 3 times and transfering time has been about among 35 and 60 sec. , while for my opinion it must be about 10 seconds.
Both laptops in local network icon (Windows XP Pro) show link is 1 Gbit.

If I link the 2 laptops with cross ethernet cable I have similar time.
what do you think ?

**magnethead** · 01-29-2009, 01:08 PM

gigabit = 1/8 of a Gigabyte. So it should take between 7 and 9 seconds to transfer.

Does task manager > resource monitor show 100% network utilization during transfer?

zio_mangrovia · 01-30-2009, 12:46 PM

I'll check it but ... it could be disk sata controller as bottleneck ?!

**magnethead** · 01-31-2009, 01:03 AM

Quote:

Originally Posted by zio_mangrovia

I'll check it but ... it could be disk sata controller as bottleneck ?!

ermm

are both computers SATA?

Early SATA is 1.5 gigabits per second... SATA II is 3 Gbits per second. But IDE is only 133 Megabits per second...

zio_mangrovia · 01-31-2009, 05:02 AM

Hard disk of my two laptop have SATA1 interface, however I noted this one:

DOWNLOAD test:
Laptop A: I download file (1 GB) from laptop B 35 seconds
Laptop B: I download file (1 GB) from laptop A 30 seconds

UPLOAD TEST:
Laptop A: I upload file (1 GB) from laptop B 52 seconds
Laptop B: I upload file (1 GB) from laptop A 53 seconds

1- Why upload is more slow then download operation ?
2- Transfer time (1 Gb file with SATA1) should have to be about 7 sec for 1 GB file ?!

I'll check network utilization by task manager.

**Aus_Karlos** · 01-31-2009, 07:02 PM

Most HDDs can only read/write at 50-60mb/s. The Raptor HDD can do upto 130mb/s. Even though the SATA link is 3gb/s your never going to get it. The fastest ive gotten a HDD - HDD transfer over a 100Mb line is 40mb/s and a gigabyte line close to 60mb/s

**johnwill** · 02-02-2009, 07:18 AM

You are dreaming if you think you're going to get the full bandwidth of a gigabit network link doing file transfers. The protocol overhead of the SMB protocol will limit the transfers a BUNCH. It's pretty normal to get 20-25mbyte/sec maximum speed over a dedicated gigabit link, any more is dreaming.

zio_mangrovia · 02-04-2009, 10:09 AM

Quote:

Originally Posted by Aus_Karlos

Most HDDs can only read/write at 50-60mb/s. The Raptor HDD can do upto 130mb/s. Even though the SATA link is 3gb/s your never going to get it. The fastest ive gotten a HDD - HDD transfer over a 100Mb line is 40mb/s and a gigabyte line close to 60mb/s

I think slowing problem could be Linux Samba protocol ?!

**johnwill** · 02-04-2009, 11:37 AM

Quote:

Originally Posted by magnethead

Early SATA is 1.5 gigabits per second... SATA II is 3 Gbits per second. But IDE is only 133 Megabits per second...

Uhh... not really. IDE speeds are measured in bytes, not bits. UDMA-133 is actually 133mbytes/sec.

**johnwill** · 02-04-2009, 11:47 AM

Another issue here is that for SMB in a workstation environment, many times writing to the remote workstation is a bunch slower than reading from the remote workstation.

01-29-2009, 12:43 PM	#1 (permalink)
zio_mangrovia Registered User Join Date: Jan 2009 Posts: 4 OS: Windows Vista	Gigabit NIC I have two kind of Bell laptops with both Gigabit NIC which are linked to AT-GS924 (unmanaged switch with 24 ports in Gigabit). I copied a file of 1 GByte from laptop A to laptop B it twice or 3 times and transfering time has been about among 35 and 60 sec. , while for my opinion it must be about 10 seconds. Both laptops in local network icon (Windows XP Pro) show link is 1 Gbit. If I link the 2 laptops with cross ethernet cable I have similar time. what do you think ?

01-29-2009, 01:08 PM	#2 (permalink)
magnethead Registered User Join Date: Mar 2006 Location: Texas, USA Posts: 3,570 OS: Vista ultimate 32bit My System Blog Entries: 3	Re: Gigabit NIC gigabit = 1/8 of a Gigabyte. So it should take between 7 and 9 seconds to transfer. Does task manager > resource monitor show 100% network utilization during transfer? __________________ For proper support: what are you running? graphics, cpu, m/board, ram, PSU brand wattage PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER . Bench Testing Your System

01-30-2009, 12:46 PM	#3 (permalink)
zio_mangrovia Registered User Join Date: Jan 2009 Posts: 4 OS: Windows Vista	Re: Gigabit NIC I'll check it but ... it could be disk sata controller as bottleneck ?!

01-31-2009, 05:02 AM	#5 (permalink)
zio_mangrovia Registered User Join Date: Jan 2009 Posts: 4 OS: Windows Vista	Re: Gigabit NIC Hard disk of my two laptop have SATA1 interface, however I noted this one: DOWNLOAD test: Laptop A: I download file (1 GB) from laptop B 35 seconds Laptop B: I download file (1 GB) from laptop A 30 seconds UPLOAD TEST: Laptop A: I upload file (1 GB) from laptop B 52 seconds Laptop B: I upload file (1 GB) from laptop A 53 seconds 1- Why upload is more slow then download operation ? 2- Transfer time (1 Gb file with SATA1) should have to be about 7 sec for 1 GB file ?! I'll check network utilization by task manager.

01-31-2009, 07:02 PM	#6 (permalink)
Aus_Karlos Moderator, Games Team Join Date: Mar 2007 Location: Western Australia Posts: 3,452 OS: Vista Ultimate x64, Windows XP 32-bit/64-bit, Ubuntu x64, Windows 7 x64 Beta My System Blog Entries: 2	Re: Gigabit NIC Most HDDs can only read/write at 50-60mb/s. The Raptor HDD can do upto 130mb/s. Even though the SATA link is 3gb/s your never going to get it. The fastest ive gotten a HDD - HDD transfer over a 100Mb line is 40mb/s and a gigabyte line close to 60mb/s __________________ MemTest86 / Nvidia Drivers / ATI Drivers / DirectX 9.0c / Sys Requirements / Everest Folding@Home

02-02-2009, 07:18 AM	#7 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,748 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: Gigabit NIC You are dreaming if you think you're going to get the full bandwidth of a gigabit network link doing file transfers. The protocol overhead of the SMB protocol will limit the transfers a BUNCH. It's pretty normal to get 20-25mbyte/sec maximum speed over a dedicated gigabit link, any more is dreaming. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience

02-04-2009, 11:47 AM	#10 (permalink)
johnwill Manager, Networking Forums Join Date: Sep 2002 Location: S.E. Pennsylvania, US Posts: 41,748 OS: Windows 7, XP-Pro, Vista, Linux Blog Entries: 1	Re: Gigabit NIC Another issue here is that for SMB in a workstation environment, many times writing to the remote workstation is a bunch slower than reading from the remote workstation. __________________ If TSF has helped you, Tell us about it! or Donate to help keep the site up! Microsoft MVP - Windows Desktop Experience