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System Administrator applied linux 5 patch and kernel upgrade now can't see Oracle ASM diskgroups

Posted on 2014-07-21
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Last Modified: 2014-08-15
After the System Administrator upgrade the kernel and applied linux patch I am unable to restart all the oracle software. I noticed that the raw ASM diskgroups are no longer visible when i do a fdisk -l what step am I missing or the SA in order to make the diskgroups visible

The database is 11.2.0.3 RAC with 3 nodes
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Question by:sikyala
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by:dlethe
dlethe earned 250 total points
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Well, a good start is to look at release notes and see what changed. For all you know this could have been caused by a system reboot on the same kernel.     The important thing to remember is device names and WWNs are NOT locked in stone, especially with multipathing.   Add a new disk and what was /dev/sdd before could now be /dev/sde.

There are things a sysadmin can do for persistence of device names.  I'd look at that first and see if problem is due to that happening.

Updating a kernel could remove that persistence and any soft links as well.
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MikeOM_DBA earned 250 total points
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1) Do what dlethe suggests
2) Re-link Oracle:  
$ORACLE_HOME/bin/relink all

Open in new window

3) Check the linkage logs.
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by:sikyala
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the SA reverted back to an earlier version of the OS kernel by changing a number in a file to 1. Now I am able to start asm and the database. However, having the later version of the kernel is needed for hardening purposes. I found a version of the kernel in oracle for asmlib. should I upgrade the asmlib kernel?
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by:sikyala
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the version was 2.6.18-274 and it was upgraded to 2.6.18-371
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by:sikyala
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2.6.18-274.7.1.e15 is what it is currently running
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by:sikyala
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2.6.18-371.9.1.e15 is what the kernel was upgraded to
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by:sikyala
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The SA changed the default value to 1 so that the server would boot with the 2.6.18-274.7.1.e15 kernel
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by:sikyala
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after I relink node 2 and 3 now asm fail initializing when i type  oracleasm start I have no problem on node 1
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by:sikyala
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I forgot to reboot the server after I edited the /etc/grub.conf file
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by:sikyala
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i figured most on my own
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