>>>Hay network gurus,
>>>
>>>We have LAN network of a couple of servers (Win 2003 R2) and about a dozen workstations (WIN 7),
>>>
>>>I am trying to assist our IT people to determine why the upload to the server(s) are slow (~0.89MBps). But the download looks right (~81.37MBps). What would be causing this? Where should be looking.
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>>Are all workstations (or at least 2 or 3) showing that behaviour?
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>All the machines.
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>>If antivirus on the server is scanning uploaded files, that will slow uploads. Try turning off real-time scanning, or exclude a folder where you can upload some test files.
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>Just looked, and there does not appear to have any antivirus software installed. I did notice the boot drive (C:) is completely full. They allocated just enough for the OS. Only the D: drive is shared. Are files being copied to a alternated drive (D:) cashed first to the C: drive? If so the delay may be the fact that only small chucks of data are processed at a time, do to the low free disk space.
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>>If it's actually SBS 2003 R2, in a lot of small networks the disk subsystem in the server is overloaded. Run PerfMon on the server and look at the Average Disk Queue Length counter (Google it for interpretation).
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>>Beyond that you'll have quite a bit of work looking at running processes on the server, and network configuration (P2P vs domain, DNS, router/gateway etc. etc.)
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>Thanks for suggestions. I will need to do some more investigating before I dig in make any changes.

Deal with the full OS volume right away. My rule of thumb is, 80% full is yellow alert, 90% full is red alert, anything over 95% is the computer equivalent of a medical emergency.

If the page file is on the full C: drive and the page file is getting used, it will make the whole disk subsystem very slow. Most times, separate OS C: and data D: volumes are on the same physical drive, so any disk thrashing caused by low space on one volume will affect the whole drive.

Lots of bad things happen when you get really low on free space on the OS volume.