Hey Derek,
Be sure to verify that you are not connected at half duplex:
In some older drivers (Intel Pro 10/100/1000) there is an autoneg bug which
keeps you from correctly inheriting the switch port settings.
# ethtool eth1
# ethtool -s eth1 speed 1000 duplex full auto off
On Sun, Feb 19, 2012
Thanks to all of you who have helped. You've given me enough things to
try to keep me busy for a while.
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Unless you have actual "shielded" catX with a foil wrapping inside,
and/or separation of the 4 pairs individually (cat6e/cat7), don't assume
it's shielded from microwaves and fluorescent ballasts. Higher the cat,
the better/faster modulation they support for data transmissions
(100m/1g/10g/40g
Cat 5 doesn't shield the line s well as 5e or 6 does. So there is
degredation. Also I have found that your hdd speed can effect overall xfer
performance as well.
On Feb 18, 2012 9:36 PM, "Derek Trotter" wrote:
> I have two computers sitting right next to each other connected via a 6
> foot long p
On Sat, Feb 18, 2012 at 11:46 PM, Michael Butash wrote:
> Protocols vary widely for me. NFS is faster than CIFS by at least 40%, ftp
> is fast when the disk being written to isn't io-locked. Use the sysstat
> package and iostat to monitor disks. Tweaking with schedulers,
> tcp_rmem/wmem, qos, e
Look at your disks. If you run a gui on your ubuntu box, use gkrellm
with a view per-disk. You can usually tell easily with it when
something is gnawing on a disk and chugging down the system. SSD's for
personal computing made this problem go away largely for me. Using
gkrellim, you can see
protocol matters too. SMB is very slow. FTP seems to be the best for me.
On Sat, Feb 18, 2012 at 9:43 PM, Mike Bydalek wrote:
> What's the data you're transferring? Lots of small files (ie
> pictures) or large files (ISOs, MP4s, etc)?
>
> What's the OS of each side?
>
> The problem could be you
Take a look at these to see what may be going on:
http://www.pcausa.com/Utilities/pcattcp.htm
http://iperf.sourceforge.net/
Some other suggestions would be updating the drivers as well.
Regards,
Mike
On Feb 18, 2012, at 10:05 PM, Derek Trotter
wrote:
One of the machines runs windows xp. Th
On 02/18/2012 09:36 PM, Derek Trotter wrote:
> I have two computers sitting right next to each other connected via a 6 foot
> long
> piece of cat 5 I picked up at Wally World one day. They both have gigabit
> ethernet cards in them. Both machines recognize the connection as a gigabit
> connectio
One of the machines runs windows xp. The other runs either kubuntu
10.04 LTS or windows xp. Sometimes I and moving large files and
sometimes smaller ones. There's not a lot of difference between what os
the machine is running or what's being transferred. Although the
transfer speed does dro
What's the data you're transferring? Lots of small files (ie
pictures) or large files (ISOs, MP4s, etc)?
What's the OS of each side?
The problem could be your cable as 1000BASE-T was made to work with
Cat5, but Cat5 wasn't designed to work for 1000BASE-T.
Regards,
Mike
On Feb 18, 2012, at 9:36
I have two computers sitting right next to each other connected via a 6
foot long piece of cat 5 I picked up at Wally World one day. They both
have gigabit ethernet cards in them. Both machines recognize the
connection as a gigabit connection, but I'm lucky to get half that.
Most of the time
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