We're on RAC in 11g on RH 6 on Dell with EqualLogic storage. Today we experienced something
pretty worrying. We had an hardware issue which forced us to replace the motherboard and
network cards of a blade (due to connection problems to iscsi portal after firmware upgrade).
Anyway once the hardware was replaced, we rebooted it several times cause the ASM disksgroups
wouldn't pop up as expected - at some point when running "oracleasm querydisk" on every disk
listed in /dev/oracleasm/disks, I had output as unconsistant as for example:
~ Device "/dev/oracleasm/disks/ASMARCH1" is marked an ASM disk with the label "ASMSSD8"
~ Device "/dev/oracleasm/disks/ASMARCH2" is marked an ASM disk with the label "ASMSTANDBYREDO"
~ Device "/dev/oracleasm/disks/ASMARCH5" is not marked as an ASM disk
~ Device "/dev/oracleasm/disks/ASMFRA1" is marked an ASM disk with the label "ASMSSD4"
~ Device "/dev/oracleasm/disks/ASMSTANDBYREDO" is marked an ASM disk with the label "ASMARCH3"
As you can see it was pretty messy; we had to reboot twice and run "scandisk" several times before
it fell back on its -good- feet again (before seeing for every disk made "Device X is marked an ASM disk
with the label <matching X>").
I can't understand why it temporarily mixed things up so bad: did it ever happen to you ??
Thanks a lot.