>I don't have the GS/OS >reference volume, so I don't know how big the I/O buffers are, but I assume >they are 512 bytes long (?) The GS/OS reference makes no reference to i/o buffers. I believe I/O is done directly to where the program asks for it. I guess the FST's maintain some information on each open file, but no limits are mentioned. --Jay, jay.krell@cornell.edu