Answer / guest

Cause: An ALTER DISKGROUP ADD DISK command specified a disk
that could not be discovered by one or more nodes in a RAC
cluster configuration.

Action: Determine which disks are causing the problem from
the GV$OSM_DISK fixed view. Check operating system
permissions for the device and the storage sub-system
configuration on each node in a RAC cluster that cannot
identify the disk.

Please add more information about this Error

Answer / nakka nageswara rao

HI All,

you need to run the bellow command on all other nodes also.
so that the disk come to visible on other nodes also

(root)

#oracleasm listdisks
#oracleasm scandisks
#oracleasm listdisks

Then try to add that newdisk to diskgroup by alter
diskgroup command.

still if you are facing any issues check that asm alert log
and oracleasm logs

cat /var/log/oracleasm

ORA-15009: ASM disk "string" does not exist

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