[dm-devel] mapper device perms on reboot

[Scott Moseman]

Thanks for the info.  Our problem has been isolated as lack of direct
i/o support on our Red Hat box.  The problem does not appear to be
MPIO related, at least not from what Oracle support is telling me.  So
now I'm off to deal with Red Hat support to see how they counter.

Thanks,
Scott



On Wed, Feb 27, 2008 at 1:17 PM, Dharmesh Kamdar <kamdard71 at yahoo.com> wrote:
>
> Hi Scott,
>
>  This weblink may help -->
>  http://www.ardentperf.com/2008/02/13/oracle-clusterware-on-rhel5oel5-with-udev-and-multipath/
>  I've not tried this, but the author of the article
>  claims that it works..
>
>  We are also facing similar issue(s) with Oracle and
>  RHEL 5.1 using UDEV/Device-mapper..I've also posted a
>  query on the same
>  (https://www.redhat.com/archives/dm-devel/2008-February/msg00201.html)
>  ...But it just discusses the changing of permissions,
>  however creation of raw devices using UDEV is not
>  specified, hence we are still looking for that answer.
>
>  Hope it helps somewhat.
>
>  Let us know.
>
>  Regards,
>  Dharmesh.
>
>
>  --- Scott Moseman <scmoseman at gmail.com> wrote:
>
>  > How can I get the mapper device permissions set on
>  > reboot?
>  >
>  > When I attempted to try this...
>  >
>  > # cat /etc/udev/permissions.d/50-udev.permissions |
>  > grep mapper
>  > mapper/mpath*:oracle:dba:0660
>  >
>  > But it did not seem to work...
>  >
>  > # ls -l /dev/mapper/mpath*
>  > brw-rw----  1 root disk 253, 2 Feb 26 20:56
>  > /dev/mapper/mpath0
>  > brw-rw----  1 root disk 253, 5 Feb 26 20:56
>  > /dev/mapper/mpath0p1
>  > brw-rw----  1 root disk 253, 3 Feb 26 20:56
>  > /dev/mapper/mpath1
>  > brw-rw----  1 root disk 253, 4 Feb 26 20:56
>  > /dev/mapper/mpath1p1
>  >
>  > Am I doing something wrong?  Is there another way to
>  > do this?
>  >
>  > Thanks,
>  > Scott
>  >