Classification: Public We tripped over something with z/OS 2.1 maintenance and volcounts. These are some notes I have:
With z/OS 2.1, an enhancement to DFSMS came in which meant that when a dataset (tape in this case) filled 5 volumes, DFSMS automatically created the additional control blocks to extend by another 5 tapes...and then another and so on Until we applied maintenance to z/OS 2.1, that happened regardless of the VOL,,,x parameter in JCL or in the DATACLAS, After, the system now honours the VOL,,,x parameter or what's in the DATACLAS (and I think the DATACLAS overrides the JCL). A selection of DATACLAS's had VOLCOUNT=1 set (which really means 5 vols), and this caused us some abends. We raised a PMR with IBM, and one part of the dialogue went: There was a RAS enhancement to eliminate ABEND837-08 for tape data sets introduced by APAR= OA46493. This APAR also has a detailed description how the VOLCNT allocation should work. Andy Styles z/Series System Programmer -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Beesley, Paul Sent: 09 October 2018 13:54 To: IBM-MAIN@LISTSERV.UA.EDU Subject: z/OS 2.3 and VOLCOUNT -- This email has reached the Bank via an external source -- Did something change with VOLCOUNT parameter handling between z/OS 2.1 and 2.3? We have a job that uses 21 tapes to backup an application's datasets, and has this parameter: VOL=(,RETAIN,,20), Following the upgrade to 2.3 at the weekend, this job failed S837-08, indicating it has run out of tape volumes, which is quite correct. However, looking back at the previous runs, they all have used 21 tapes. So they should really have abended as well, but all worked ok. Hence, wondering if something has changed in volume count processing, or whether there was a bug in 2.1 which was fixed in 2.3. Would appreciate any suggestions before I face the Spanish inquisition who are claiming that my upgrade broke their job. Paul Atos, Atos Consulting, Worldline and Canopy The Open Cloud Company are trading names used by the Atos group. The following trading entities are registered in England and Wales: Atos IT Services UK Limited (registered number 01245534), Atos Consulting Limited (registered number 04312380), Atos Worldline UK Limited (registered number 08514184) and Canopy The Open Cloud Company Limited (registration number 08011902). The registered office for each is at Second Floor, Mid City Place, 71 High Holborn, London, WC1V 6EA. The VAT No. for each is: GB232327983. This e-mail and the documents attached are confidential and intended solely for the addressee, and may contain confidential or privileged information. If you receive this e-mail in error, you are not authorised to copy, disclose, use or retain it. Please notify the sender immediately and delete this email from your systems. As emails may be intercepted, amended or lost, they are not secure. Atos therefore can accept no liability for any errors or their content. Although Atos endeavours to maintain a virus-free network, we do not warrant that this transmission is virus-free and can accept no liability for any damages resulting from any virus transmitted. The risks are deemed to be accepted by everyone who communicates with Atos by email. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Lloyds Banking Group plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC95000. Telephone: 0131 225 4555. Lloyds Bank plc. Registered Office: 25 Gresham Street, London EC2V 7HN. Registered in England and Wales no. 2065. Telephone 0207626 1500. Bank of Scotland plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC327000. Telephone: 03457 801 801. Lloyds Bank Corporate Markets plc. Registered office: 25 Gresham Street, London EC2V 7HN. Registered in England and Wales no. 10399850. Lloyds Bank plc, Bank of Scotland plc and Lloyds Bank Corporate Markets plc are authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and Prudential Regulation Authority. Halifax is a division of Bank of Scotland plc. HBOS plc. Registered Office: The Mound, Edinburgh EH1 1YZ. Registered in Scotland no. SC218813. This e-mail (including any attachments) is private and confidential and may contain privileged material. If you have received this e-mail in error, please notify the sender and delete it (including any attachments) immediately. You must not copy, distribute, disclose or use any of the information in it or any attachments. Telephone calls may be monitored or recorded. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
