Question

what is the maximum speed of I/O that can be supported in my SATA Dard Drive?

Asked by: asrawahi

I am using a DELL Latitude E6400 series laptop which is coming with SATA HD. I am using my Network card to exchange some Huge files from the network and from the USB port too. what is the maximum amount of data that i can save per second using the USB interface and by using the NIC interface?

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Asked On
2009-11-02 at 04:29:29ID24863373
Topics

Storage Technology

,

Computer Hard Drives

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Answers

 

by: sgsm81Posted on 2009-11-02 at 04:33:08ID: 25718779

"Real World" performance will depend on a variety of factors not limited to the device at each end of the cable.

How big are the files ?, speeds can be increased by disabling antivirus, running through safe mode etc

 

by: dlethePosted on 2009-11-02 at 04:59:28ID: 25718906

Typical premium USB flash memory sticks can write up to about 15MB/sec.   Some write at MUCH slower speeds.  So if your question is really, "my network to USB file saving performance is awful .. what is the best case scenario?"  Then read the specs on your stick.  You could very well have a stick that can't write any faster than 5-10MB/sec.   If you plan on doing a lot of USB file saving then get yourself an eSATA card for your dell and use an external eSATA-attached HD.   Anything less will not be able to keep up with a 1Gbit ethernet port.

 

by: asrawahiPosted on 2009-11-02 at 07:24:24ID: 25720175

So with the current configuration:

Intel Core Duo T2400 / 5 Mb Cache / 1.83 GHz / 667 MHZ FSB
15.4" Wide-screen XGA Display with Truelife
120 Gb 5400 rpm Sata Hard Drive
1 Gb DDR2 SDRAM / 553 MHZ
256 Mb ATI Mobility Radeon X1400 Hyper memory
Windows XP Media Center
9 - Cell Battery
NIC 1 GB

what will be the best file transfer speed from the network interface NIC 1GB if my antivirus is not running and if all the startup applications are disabled on windows 7 professional?


 

by: maximus5328Posted on 2009-11-02 at 10:27:46ID: 25722082

if you are connected to 1Gb network then saving files to your internal hard drive will go at around 25 MB/sec - this is actually a limitation of your hard drive.
if connected to 100 Mb network then the speed will drop to 12 MB/sec - limitation of the network
saving from USB hard drives - 25 MB/sec

 

by: asrawahiPosted on 2009-11-02 at 10:55:53ID: 25722396

Thanks for the information

but why "if connected to 100 Mb network then the speed will drop to 12 MB/sec - limitation of the network"

why i shouldn't be able to get the speed of 25 MB/s since it is a limitation of a Hard  Drive not the NIC?

 do you have a source?

 

by: maximus5328Posted on 2009-11-02 at 12:51:43ID: 25723572

1 Gb connection can theoretically transfer data with 128 MB/sec speed. Real-world speed is less.
100 Mb connection is 10 times less ~ 12 MB/sec
Hard drive with 5400 rpm can save data at a rate ~ 25 MB/sec

So depending on how fast is your network connection, the bottleneck will be either hard drive or connection itself.

 

by: BigSchmuhPosted on 2009-11-02 at 13:34:12ID: 25723995

The best "real-world" performance should be the minimum of all those maximum sustainable speeds below:

  • Your network card allows for 110 MB/s when connected to a 1Gbe switch(rare case outside the server room)... and only 12MB/s on a 100Mbs switch 
  • Your USB 2.0 ports allows up to 40MB/s (the theory is 60MB/s)
     
  • Any recent SATA drives allows a minimum of 70MB/s (on inner zones and 110MB/s on outer zones of the HDD) even at the low 5400 rpm speed 
  • You eSATA port allows for SATA speeds on external drives (that means the external HDD speed is the limit)
     

Conclusion
If your large files are on a network, connect to a 1Gbe and copy to an external eSATA HDD (it usually requires an USB port to be powered normally) for a throughput of 70 to 110MB/s (limited by the external HDD...and close to the 1Gbe limit as well)

 

by: asrawahiPosted on 2009-11-03 at 04:59:01ID: 31648792

The explanation was perfect

20120131-EE-VQP-002

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