Hello listers, We've been working on upgrading to z/OS 1.7 (from 1.4), and just came across a new field in RMM volume definition - the world wide ID. The help panel states that the WWID field specifies a unique value identifying the volume and "is recorded in the volume by the manufacturer and is recorded by DFSMSrmm when the volume is first used. When you next use the volume, DFSMSrmm ensures that the correct volume is mounted by checking the WWID still matches the recorded value."
Hmm, interesting. The fine manual (Guide & Ref.) states: "You can specify the WWID only if it is not already set. If the WWID is already set, you cannot change it." We began to wonder how this field would come into play if a tape ever needed to be replaced. Obviously, the new tape would have a different unique value, though it would have the same VOLSER. Would RMM reset the value if the tape was marked for REPL (or INIT)? I can't find this stated anywhere in the manual. In fact, I can't locate in the "New Information" section when this field was added to RMM. Does anyone have any experience with replacing a tape that has an associated WWID and understand how this works? I note that in the explanation of ADDVOLUME, there seems to be an indication that the field will only be used for WORM tapes: "When you are defining WORM tapes to DFSMSrmm, allow DFSMSrmm to record the volume WWID when the volume is first used on the system rather than specifying the WWID yourself. This ensures that the WWID for the volume is recorded correctly." Possibly, I'm concerned about something that won't affect me at this shop. Thanks in advance, Greg Shirey Ben E. Keith Company ######################################################################## Notice.....Notice : Ben E. Keith has changed our email address from bekco.com to benekeith.com. The user-id to the left of the "@" has not changed. Please change your contact info to this new email address. ######################################################################## ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
