We used to have the root mounted R/W and after it got filled up by uneducated users putting files in it we decided to clean it up and make it R/O. It took the 'fall back' weekend to give us the time to be able to move all of the c**p out of the root on our production systems. I strongly suggest mounting it R/O and dealing with the occasional change to R/W to add new directories. Jon
-----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Mark Zelden Sent: Thursday, December 29, 2011 10:38 AM To: [email protected] Subject: Re: z/OS 1.13 - Can the root file system be shared as read/write? On Thu, 29 Dec 2011 09:25:34 -0600, Mark Zelden <[email protected]> wrote: > >On sysplexes that have shared file systems, I usually put the "directory" file >system >mount points in the sysplex root. It is already R/W and survives across OS >upgrades. So instead of a "one time thing" per OS upgrade, it is a >"one time thing" - period. > >BTW, the same warning about "junk" in the sysplex root as previous >warnings. Was at a shop with many sysprogs (CICS/DB2/MVS) that had >"SU" auth and ended up creating a lot more than just mountpoints in the >sysplex root. Eventually the sysplex root had a space issue >and cleanup needed to be done. This was before the newroot >support was added to z/OS (but doing the cleanup was the right thing >to do anyway). > Jon's post reminded me that while the original design / instructions may have had the sysplex root mounted as R/W, not all the sysplexes I support have it that way now. Some of them mount it as R/O and it gets changed to R/W if needed to create a new mount point if needed. That is rare due to standards that are in place and it keeps the junk from getting put in there. Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:[email protected] Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN This e-mail may contain confidential or privileged information. If you think you have received this e-mail in error, please advise the sender by reply e-mail and then delete this e-mail immediately. Thank you. Aetna ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
