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Thread: Gigabit switch - Actually real world speeds

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    Jay
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    Gigabit switch - Actually real world speeds

    If anyone here is running a GBit network what are you getting between two clients?

    I am transfering a file and getting about 300Mbps
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    Resident abit mourner BUFF's Avatar
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    Re: Gigabit switch - Actually real world speeds

    that file has to be read/written though so how fast can your HDDs work?

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    Re: Gigabit switch - Actually real world speeds

    Quote Originally Posted by BUFF View Post
    that file has to be read/written though so how fast can your HDDs work?
    Modern hard drives go a lot faster than that! 70-100mb/s should be attainable by the hard drive, this is under 1 Gigabit, so you should be getting faster speeds imo, but I have no experience with gbit so I am just guessing here...

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    Re: Gigabit switch - Actually real world speeds

    edit : too late/early & i'm getting my MB, Mb, mb confused ...
    Last edited by BUFF; 17-04-2008 at 02:14 AM.

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    Re: Gigabit switch - Actually real world speeds

    Quote Originally Posted by BUFF View Post
    average sustained transfer rate for a single, modern 7200rpm hdd is usually~60Mb/s, a Raptor may hit 90. Burst rate for a SATA300 drive may be a lot higher but that's only from the cache so I'm guessing that he has a RAID array.
    Newer drives (eg 640gb/1tb) drives have denser platters so can do about 90Mb/s afaik... or am I reading this wrong?


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    Re: Gigabit switch - Actually real world speeds

    write speed will be slower though.
    1 Gigabit/s is 125MB/s
    300Mb/s is 37.5MB/s

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    YUKIKAZE arthurleung's Avatar
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    Re: Gigabit switch - Actually real world speeds

    I have a Dell Powerconnect 2616 GbE switch (4 yrs old stuff) that doesn't support Jumbo-Frame.

    All my machines are Cat6 connected.

    The transfer speed is heavily dependent on what program you use to transfer.
    Windows explorer is **** for almost all situation.

    My 2 fastest clients use:
    Intel Pro/1000 PT
    Nforce4 (Marvell chipset i think)

    (Following are in Src -> Dest format)
    RAID5 -> 1x Non-RAID 40MB/s
    1x Non-RAID -> RAID5 40MB/s
    1x Non-RAID -> 1x Non-RAID 40MB/s
    2x Non-RAID -> 2x Non-RAID 65MB/s
    3x Non-RAID -> 3x Non-RAID 83MB/s

    At 70MB/s+ the CPU basically maxed out with optimization set to throughput.
    Push / Pull also seems to have some effect on speed
    Transffered using Total Commander. Speed with Windows Explorer is more random and could get like 10~25MB/s per thread.

    I guess if I could use Jumbo-Frame the speed should be slightly faster.

    Update: I just verified the data with my (slow) NF430 and it cap at 50% GbE usage with 2 threads. Don't have that much hdds in the other testing machine anymore so I can't test 3 threads.
    Last edited by arthurleung; 17-04-2008 at 03:39 AM.
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    Re: Gigabit switch - Actually real world speeds

    That's still pretty fast, I think I will go gigabit when I get a NAS

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    Re: Gigabit switch - Actually real world speeds

    ya thats a good idea for nas

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    Re: Gigabit switch - Actually real world speeds

    Quote Originally Posted by SiM View Post
    That's still pretty fast, I think I will go gigabit when I get a NAS
    I believe the fastest stand-alone NAS in existance is the N5200 Pro, but still AFAIK tops at about 30MB/s. Lower end models that cost 2/3 or less won't even get past 100Mbps.
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    Re: Gigabit switch - Actually real world speeds

    Quote Originally Posted by arthurleung View Post
    I believe the fastest stand-alone NAS in existance is the N5200 Pro, but still AFAIK tops at about 30MB/s. Lower end models that cost 2/3 or less won't even get past 100Mbps.
    I will be building my own NAS using mobo with onboard gigabit ethernet and freenas... Would that be faster? And does freenas support onboard raid 5? Sorry for going a bit OT

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    Does he need a reason? Funkstar's Avatar
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    Re: Gigabit switch - Actually real world speeds

    Quote Originally Posted by arthurleung View Post
    I believe the fastest stand-alone NAS in existance is the N5200 Pro, but still AFAIK tops at about 30MB/s. Lower end models that cost 2/3 or less won't even get past 100Mbps.
    Thats about right. I believe people have seen up to 35MB/s, perhaps edging past that.

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    Jay
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    Re: Gigabit switch - Actually real world speeds

    well I use XP to 2003 server both Asus onboard. I copied a 1GB file and my overall use never went over 30%. My end is 2 x 250GB SATA 150 Drives RAID 0 on the other is 2 x 500GB Samsung SATA 300 drives in RAID 1.
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    Re: Gigabit switch - Actually real world speeds

    I see 30-40MB/s but it really depends on the drive(s) i'm using. Bloody quick compared to my old 100mbit lot.
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    Re: Gigabit switch - Actually real world speeds

    What is a utility that can monitor hard drive I/O?

    I only can see my network card's I/O in task manager, and it's only in "percent"... not that useful, really, since it never goes over like ~20%.

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    Re: Gigabit switch - Actually real world speeds

    That'd be HDTach

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