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1. Non-anonymous (s)FTP requires a SLAC unix account and that has been deemed unacceptable by LSST project team
2. Anonymous FTP server suffers from several shortcomings:
   1. The server software cannot restart an interrupted data transfer
   2. The AFS-backed store is possibly not scalable to the hundreds of GB needed
   3. The 3-day dwell period is too risky for the data
   4. The AFS permissions combined with the 3-day swell dwell do not allow for the type of permissions that would allow for a convincing separation between the two vendor's data
   5. The dropbox paradigm does not allow for vendors to manage its data once at SLAC, i.e., to replace faulty data files.

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