[Ocfs-users] Strange "feature"

Wim Coekaerts
Fri, 15 Aug 2003 02:42:30 -0000

but they have different GUIDs
why would you mount the partitions on the same mountpoint in the first
place
shouldn't you have 1 device only with th failover stuff underneath
or have 2 devices and 1 virtual device that gets the fall back

in theory you shoulndn't have to care/worry about config slots being
there still, we don't have a tool to remove slots, but is should also
not be needed, the guid is in the /etc/ocfs.conf file
and when you mount it will use the slot that has that guid in there

On Mon, Aug 11, 2003 at 06:20:13PM +0200, Bluth, Gunnar
wrote:
> Hi all!
>
> Doing my first steps with OCFS (1.0.9), I ran across a nifty little
> "feature"....
>
> We've been trying if DMP with QLogic 2300 HBAs works without having DMP
> activated (ok, blame on me...).
> ocfstool allows you to mount different partitions on the same mountpoint,
but
> after we tried that, everything went to state "D" and we chose to
reboot the
> whole cluster (4 nodes).
>
> After rebooting, ocfstool shows 6 (!) slots per partition, with 2 nodes
> configured twice, each with two different GUIDs.
>
> Since documentation is rare for this kind of stuff, I sniffed around a
little
> bit and found out that these mappings are written to the first
"line" of the
> raw partition.
> E. g. "head -n1 /dev/sda8" shows:
> OracleCFS/mnt/oraocfs-v0??
>                           ?\??$
>
?}?DT???????oracleM3?v(U?mD}?i?s????NODECFG????rac04F36051760F4649D402B90040A5B16206130.21.169.24X???rac03132F09F13442E03CD23D0040A5B1C2C9130.21.169.23X???rac026C00E52AF09EA8F0193C0040A5B1C235130.21.169.22X???rac017FBEFF358A2950CF25F90002A5CE4B1C130.21.169.21X???rac02556B3D40EA87C7AD58280040A5B1C235130.21.169.22X???rac042A2F091A36FF8E2085C80040A5B16206130.21.169.24X???NODECFG?7?0?%?
>
> As you might be able to see ;-), "rac04" and "rac02"
are mentioned twice...
>
> fsck.ocfs doesn't see any errors.
>
> Everything works (except some mount problems we also experienced
before...),
> so it's more a kind of cosmetic problem, but I'd really like to
know how I can clean this up again....
>
> Thx in advance, and regards,
> --
> Nick (Gunnar) Bluth
> Linux Systems Administrator
>
> on behalf of:
> Dresdner Kleinwort Wasserstein
> Dresdner Bank AG
> Global Business Services     <mailto: gunnar.bluth@DrKW.com>
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