When you say "shared filesystems", you are speaking of the sysplex sharing option, not simple sharing via MODE(READ). I was speaking of the simple MODE(READ) method.
_________________________________________________________________ Dave Jousma Assistant Vice President, Mainframe Services [email protected] 1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f 616.653.2717 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Veilleux, Jon L Sent: Thursday, December 29, 2011 10:12 AM To: [email protected] Subject: Re: z/OS 1.13 - Can the root file system be shared as read/write? We have a 10 system sysplex with shared filesystems and we use a REXX exec that we can run from TSO or ISHELL to change the mount attribute of the root when we need to add a new mountpoint. It uses the " 'unmount ' m.mnte_fsname mnt" command to change the mount attributes. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jousma, David Sent: Thursday, December 29, 2011 9:14 AM To: [email protected] Subject: Re: z/OS 1.13 - Can the root file system be shared as read/write? Chmount only works in a single system environment. WE share those filesystems READ only among several systems, and this would fail. _________________________________________________________________ Dave Jousma Assistant Vice President, Mainframe Services [email protected] 1830 East Paris, Grand Rapids, MI 49546 MD RSCB2H p 616.653.8429 f 616.653.2717 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of McKown, John Sent: Thursday, December 29, 2011 8:54 AM To: [email protected] Subject: Re: z/OS 1.13 - Can the root file system be shared as read/write? > -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Jousma, David > Sent: Thursday, December 29, 2011 7:27 AM > To: [email protected] > Subject: Re: z/OS 1.13 - Can the root file system be shared as > read/write? > > Cant specifically answer your question. But in general, I > don't like mounting any of the z/OS product ZFS file systems > read/write because "junk" tends to collect in them whether by > accident or on purpose. We are not doing sysplex sharing, > but do mount them all READ only. > > _________________________________________________________________ > Dave Jousma That's my plan too. I mount all my "root" filesystems (SYSPLEX, VERSION, & SYSTEM) as READ, along with the "product" filesystems as well. If I really need to do an update, I use a UNIX shell and "cd" to the proper subdirectory. Then do a "chmount -w .". Update the filesystem (update a file or rmdir or mkdir, whatever). Then "chmount -r ." again. My .profile adds /usr/sbin to my PATH, which makes using chmount easier. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. 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