Todd Burrell wrote: >Hopefully this is not a stupid question - but >is it possibly via RACF (maybe with DASDVOL) >to allow a particular system to have only read >access to a DASD volume? We have a need to >possibly vary some devices onto a system in one >plex while it is being updated on another plex, >so we would like to ensure the one system cannot >update the volume.
Adding to the other replies, Tony Shen posted the same basic question in 2003 to IBM-MAIN. Kelvin Wells then provided a little more detail on the RACF exit approach: >take a look at IGGPRE00. You can find samples in >SYS1.SAMPLIB members RACEXITS and RACINSTL. I think my colleague Marna Walle might be on the right track, no pun intended, with another viable option. IBM fairly recently implemented enhancements to DFSMS to allow read-only access to data sets on devices that are defined as read-only using HCD. Please take a look at APAR OA50068: http://publibz.boulder.ibm.com/zoslib/pdf/OA50068.pdf Marna is exactly right that there are some caveats. This enhancement is available for z/OS 2.1 and higher. Now I'll turn to some "wilder" ideas.... WI1. The base z/OS operating system includes a Network File System (NFS) server and client. You could configure the NFS server such that it provides read-only access to a NFS client. You can configure the read-only attribute on either or both sides of the NFS connection. WI2. If you run z/OS under z/VM, z/VM supports read-only minidisks: https://www.ibm.com/support/knowledgecenter/en/SSB27U_6.4.0/com.ibm.zvm.v640.icha4/ich99acm.htm -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM Z & LinuxONE, Multi-Geography -------------------------------------------------------------------------------------------------------- E-Mail: [email protected] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
