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Why can't I delete this ASM disk ?

595268Oct 8 2009 — edited Sep 17 2012

Hi

I have a 4 node RAC cluster using ASM (10.2.0.4) on RHEL

I added a new LUN, presented it to the 4 nodes, created a partition on it, marked it as an ASM disk
and then added the disk to the existing FRA diskgroup - all good.

After the rebalance, I dropped the old disk out of the disk group, it all rebalanced fine. - again all good.

So now, I have this LUN that I no longer want to use for ASM, so I wanted to remove it from ASM by doing
oracleasm deletedisk DISK_FRA but when I do this I get the error

*# service oracleasm deletedisk DISK_FRA*
*Removing ASM disk "DISK_FRA": [FAILED]*
*#*

Looking at /var/log/oracleasm I can see
Clearing disk header: oracleasm-write-label: Unable to open device "/dev/oracleasm/disks/DISK_FRA": Device or resource busy
failed
Unable to clear disk "DISK_FRA"

What am I doing wrong ? Why is the device still busy ?

Thanks

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Locked on Oct 15 2012

Added on Oct 8 2009

#11gr2, #asm, #automatic-storage-management, #performance-availability

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