On Tue, 5 May 2009 10:49:27 -0400, Dazzo, Matt <[email protected]> wrote:
>We are running a monplex 2 lpar environment, with a few shared DASD volumes >for system folks, GRS=NONE is configured on both lpars. One lpar running >zos1.7 and one running zos1.9. There are 3 HFS files that are shared between >the 2 lpars on the volumes that are online to both system, this configuration >was set up by someone no longer here. He or she was very ignorant. You cannot share UNIX filesystems (HFS or zFS) in Read-Write mode except within a sysplex with integrity. I know. I've destroyed an HFS by updating it from two systems, not in a sysplex, at the same time. There is a long chapter on how to share UNIX filesystems in a sysplex. If you guarantee that the filesystem will only be mounted R/O to all systems, then you can (but likely should not) share them. But only if all systems are R/O. If you need update, then you need to unmount the filesystem from all systems other than the one you want to do the update. The remount R/O to all systems after the updates are complete. > >We tested z1.9 in both lpars this past weekend, when we ipl'd the 2nd lpar >with z1.9 we noticed the msg below popped up on the other lpar. I have read >chapter-9 on file sharing in the USS planning guide and found most if not all >info about file sharing was sysplex related unless I missed something, is our >current set up invalid for file sharing? Thanks Matt Remember how in the past you could "share" a page datasets (did anybody else do this other than me - by accident!). z/OS 1.9 now "protects" you from this situation. As above, sharing is only possible in a sysplex, with all the coupling datasets set up and stuff. > > >Matt Dazzo >Sr. MVS Systems Admin >Publishers Clearing House >516-944-4816 >[email protected] ---------------------------------------------------------------------- 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
