To RStor/AFS users:
   over the past couple of weeks we have upgraded all of our file servers 
to the latest version (1.6.1) of OpenAFS, along with a special patch for 
large (>2TB) server disks which should result in more robust behaviour 
from some clients.

The new fileserver software has several code improvements resulting in 
less CPU usage, which translates to faster server response when things get 
busy.

The special patch addresses client queries for device size and free space. 
Some clients, in particular Windows 7 explorer.exe, will query devices for 
free space before attempting to write files.  When the server space was > 
2TB, a 32-bit limitation could return negative numbers to the client, 
resulting in bogus 'Out of space' errors.  The servers now return valid 
data, capped at 2TB if necessary.  This seems to solve most of the Windows 
client error messages.

However, we have observed that the error still persists in some 
circumstances.  Please let us know if you have a Windows client and are 
still seeing 'Out of space' errors.

On our test system, the error does not occur if we use a mapped drive 
letter rather than the UNC path, but we do not really undertand why.  We 
are working with the developers on a solution.


Richard
-- 
Richard Brittain,  Research Computing Group,
                    Computing Services, 37 Dewey Field Road, HB6219
                    Dartmouth College, Hanover NH 03755
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