I've had this problem for a while.  Have tried several things listed below but no luck so far.

 

The Problem:

Very slow write speeds.  They vary from 35 mb a second (lovely) to 128 kb a second (horrible).  While writing a file it will start at the high speed but quickly deteriorate to the slowest speeds.  In windows 7 the bar at the top of the explorer window will be constantly refreshing (green line moving across the bar at the top of the window).

 

Reading is fine and fast, every time.

 

What I've tried from earlier suggestions -

 

Upgraded to the latest bios for my motherboard.

Installed a separate network adapter so I now have two, the motherboard one and an add on card.  Both have the same problem.

 

I'd really appreciate and answer to this as it is driving me nuts!

 

Syslog attached.

 

Thanks for any help.

 

Peter

syslog-2012-12-25.txt

A couple of things I've tried in the past to isolate the cause.

 

- disable any antivirus on your client

- disable cache drives

- use unmenu to manually spin p drives before copying.

 

I've found bad av settings caused it to slowdown.  Also noticed that if a drive needs to be spun up, the first bit of the copy zooms along then stalls until the drive is spun up.  It's a "feature" I guess that takes some getting used too.

 

Manually spinning the drives up before a copy will eliminate that as an issue for your tests.

See here: http://lime-technology.com/forum/index.php?topic=22675.msg213845#msg213845