Eginhard has nailed it. I remember the performance boost we got back in those days. It was truely a difference between a useable and a non-usable system, and it was all about storage constraints. Terry
________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Eginhard Jaeger Sent: Friday, May 07, 2010 2:55 AM SAVEFD is not about speed of access to data on the CMS minidisk, it's about saving real storage: - without SAVEFD each user accessing a common minidisk has his own copy of the file directory - with SAVEFD all users accessing that common minidisk share a common copy. ----------------------------------------- This message and any attachments are intended for the individual or entity named above. If you are not the intended recipient, please do not forward, copy, print, use or disclose this communication to others; also please notify the sender by replying to this message, and then delete it from your system. The Timken Company / The Timken Corporation