I brought this up on the list a while ago, and it is still an ongoing 
problem. Accessing files on a mapped network drive over the VPN from 
home is extremely slow. It takes a very long time even to select files 
(so as to copy them to a local folder). Once they are selected, the 
files copy quickly, but it takes forever to get them selected, to the 
point of Windows Explorer not responding. Opening files directly on the 
mapped drive is also incredibly slow and results in whatever application 
that is trying to open the file (Mathematica, Excel, Word) Not Responding.

And now, I have an even worse problem. Files that my students submit 
(via a secure webpage requiring NetID login) end up in a directory in my 
public_html directory on Zoo. Over the weekend, I copied the files to a 
local directory so that I could open them and grade them (very sloooow 
to select them for copying, as usual). Two files were completely 
corrupted (in different ways). I e-mailed the students and asked them to 
open up their file to make sure it was OK (these are Mathematica .nb 
files, which are actually ASCII) and resubmit it. Both of them said that 
their files were fine at their end, and resubmitted. I copied the newly 
submitted files to a local directory, and both were corrupted in the 
same way as before for each respective student (but different from each 
other). One of the students submitted a third time, with the same 
result. So this morning, at my office, I opened up all five of these 
files from the mapped network drive, no VPN, and lo and behold all five 
files are perfectly fine.

Any ideas:

- why the slowness in accessing files over the VPN
- why the five files kept getting corrupted when copied over the VPN 
(while another 50 files were perfectly OK)
- how to fix

Helen Read
Mathematics & Statistics