On Thu, 16 Jun 2011 17:31:52 -0500, Doug Henry <doug_he...@usbank.com> wrote:
>On Thu, 16 Jun 2011 14:07:21 -0700, Edward Jaffe ><edja...@phoenixsoftware.com> wrote: > >>On 6/16/2011 1:47 PM, Patrick Loftus wrote: >>> I HIGHLY recommend setting romount_recovery=on as per the following >link: >>> http://publib.boulder.ibm.com/infocenter/zos/v1r10/index.jsp? >topic=/com.ibm.zos.r10.e0za100/dfsmroa.htm >> >>Agreed. Of course, this should be the default. :-( >> >This is probably a misunderstanding on my part but why would you have a zfs >mounted read/write and after a failure mount it read only ? > You may have had it mounted read/write, but then set it to be mounted read only at IPL via BPXPRMxx. I first ran into this problem when after I migrated to zFS and cloned (logical copy) my SMP/E controlled root (mounted r/w) with FDRCOPY. I thought the HFS=QUIESCE parm applied to zFS and it didn't. It worked most of the time, but one time I guess all the buffers weren't flushed and when I IPLed from the cloned file system the mount failed. Luckily I found out in a sandbox first. I then changed my cloning procedures to add a specific zfsadm quiesce prior to the FDRCOPY of the "sysres" file systems (z/OS root and other product roots) - and of course an unquiesce after the copy step. Even though probably never need this parm for the MVS root, I specify it because there are other groups (CICS, MQ, DB2, WebSphere) that request my team to add R/O file systems to BPXPRMxx and I know they don't always quiesce SMP/E controlled roots before they copy them for use in production. BTW, DFDSS does the quiesce automatically (for logical copy), but FDR doesn't nor does the HFS=QUIESCE parm work for zFS (see past posts of mine in the archives about this). Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:m...@mzelden.com 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
