And in the amdahl "CMS Internals" class we wrote a Nucleus Extension to see the MODE 0 files as an exercise.
-----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Schuh, Richard Sent: Thursday, June 14, 2007 7:00 PM To: [email protected] Subject: Re: Y-disk housekeeping using SFS. And they were private only because of ignorance or lack of desire on the part of those who could link to the disk. Before there was ACCESSM0 there was DDR, so the only reasonable guarantee of privacy was to not let anyone link to the disk. Even then, there were those who had LNKNOPASS capabilities, so that was not a total guarantee. Regards, Richard Schuh -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Thursday, June 14, 2007 3:17 PM To: [email protected] Subject: Re: Y-disk housekeeping using SFS. On Thursday, 06/14/2007 at 02:36 EST, Mike Walter <[EMAIL PROTECTED]> wrote: > b) Why is it that filemode 0 (zero) files appear in a read-only SFS filespace? > OK, the "ACCESS" doc does not mention MODE0 for anything but MDISKs. But why > would it even be designed to show filemode 0 in read-only mode? With SFS, we actually had a shared *file* system, with file-level ACLs. Why give the *impression* of security, when we could provide the real thing? It also brought the mode 0 "Security Illusion" out into the actinic glare of reality. I remember a surprising number of people were unaware that their mode 0 files weren't secure, just private. Alan Altmark z/VM Development IBM Endicott -------------------------------------------------------- This message w/attachments (message) may be privileged, confidential or proprietary, and if you are not an intended recipient, please notify the sender, do not use or share it and delete it. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Merrill Lynch. Subject to applicable law, Merrill Lynch may monitor, review and retain e-communications (EC) traveling through its networks/systems. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or error-free. This message is subject to terms available at the following link: http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch you consent to the foregoing. --------------------------------------------------------
