[Ocfs-users] Strange "feature"

Bluth, Gunnar
Mon, 11 Aug 2003 11:20:25 -0000

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
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