oracleasm-read-label: Unable to open device "/dev/dm-0": No such file or directory
ASM will not mount the disks and of course the database will not start.
I tried the following:
- I checked that all the correct versions of the ASM RPMs were installed.
- I performed the oracleasm configure, which is supposed to properly set the permissions on reboot.
- I tried setting the ORACLEASM_SCANORDER per the documentation about setting up ASM on Linux Multipath disks [Document Id 602952.1].
None of these things worked.
Finally I added these lines to the top of the script /etc/init.d/oracleasm and the problem is solved:
chown grid:oinstall /dev/dm*
chmod 775 /dev/dm*
