Classification: Confidential Watch out for "seldom used" datasets e.g. year-end clients. Watch out for model DSCBs used by GDG's Make sure you have a backup before deleting.
A safer approach would be to alter the mgmt. class to (e.g. delete after 1 year of non use). HTH, -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Jason Cai Sent: Wednesday, May 8, 2024 7:17 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Consultation on the Potential Risks of Deleting Specific Datasets [CAUTION: This Email is from outside the Organization. Unless you trust the sender, Don’t click links or open attachments as it may be a Phishing email, which can steal your Information and compromise your Computer.] Dear all I am reaching out to discuss a specific operation we are considering for our z/OS DCOLLECT reports. Currently, we are planning to delete all the datasets where LASTREF=NONE and DSORG=PS. This operation seems crucial for system maintenance and optimization, yet I wanted to clarify any potential risks associated with this action. As far as I understand, LASTREF refers to the last accessed date of the file. Hence, LASTREF=NONE implies that the file has not been accessed since its creation. Could you confirm if my understanding is correct？ Additionally, I have been attempting to search for more information about LASTREF=NONE in the IBM manual, but my efforts have yielded limited success. If possible, could you kindly guide me on how to navigate the manual to find specific information like this one or recommend any reliable resources where such details may be more readily available? Lastly, does IBM have any specific requirements regarding the closure of PS datasets? By this I mean if a PS has been opened and never closed, would the LASTREF also be none? Any advice or insights you have on this matter would be highly appreciated. Looking forward to your helpful response. Best regards, Jason Cai ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ::DISCLAIMER:: ________________________________ The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ________________________________ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
