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Hi Fabrizio, Ah, one of those things they don't tell you about in the man page. You are right, it is ugly. The async I/O code in the kernel only reserves so much buffer space for async I/O requests. Apparently, I exceeded that for your copy. The solution is to revert back to doing sync I/O instead of returning an error. I will look into it. It would be nice if I had more debugging info but I don't think this is repeatable since it appears to be load depedent. Andy On Wed, 12 Oct 2005, Fabrizio Furano wrote: > Hi Andy, > > copying files with xrdcp I got this error from the kan cluster: > > 051012 09:04:16 14869 Xrd: ReadBuffer: Server > [kan007.slac.stanford.edu:1094] did not return OK message for last > request. > 051012 09:04:16 14869 Xrd: SendGenCommand: Server declared error > 3008:XrdXrootdAio: Unable to > read /store/PRskims/R14/14.4.2a/BToDlnu/04/BToDlnu_0416.03HUBCA.root; No > buffer space available > > > To me it sounds ugly. It happened approaching the end of this copy. What do you think? > > Fabrizio > >