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[SOLVED]Re: Only 8 MB/sec write throughput with NetBSD 5.1 AMD64

On Sun, Oct 9, 2011 at 5:38 PM, Manuel Bouyer 
<> wrote:
> On Sun, Oct 09, 2011 at 02:22:14PM +0530, Ravishankar S wrote:
>> Hi,
>> I am trying to set up an FTP/Samba file server for serving media files
>> at home and I am seeing only 8MB/sec disk write throughput with NBSD
>> 5.1 AMD64. Previously Windows 7 and Linux did 30 MB+/sec on the same
>> setup. I just did a simple dd to check
>> dd if=/dev/zero of=/store/test.img bs=1000K count=1000
>> pciide0 at pci0 dev 9 function 0
>> pciide0: vendor 0x10de product 0x0ad0 (rev. 0xa2)
>> pciide0: bus-master DMA support present, but unused (no driver support)
>> pciide0: primary channel wired to native-PCI mode
> NetBSD 5.1 is missing the proper entry for your IDE controller,
> as a result it's used in PIO mode.
> A 5.1_STABLE kernel should probe is as an ahci controller and performances
> will be much better.
> --
> Manuel Bouyer <>
>     NetBSD: 26 ans d'experience feront toujours la difference
> --

Thanks to all who replied. dd now shows 67 MB/sec!!. However, i have
another question. I can now ftp @ 25 MB/sec and it never increases
beyond this point. I have a dlink gigabit router and gigabit cards on
both ends. client is an  ubuntu laptop

Any other areas to explore to increase throughput? I see MTU set at
both ends at 1500 - any benefits to increasing it to 3000 - this will
enable jumbo frames automatically??

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